- 30 6月, 2016 1 次提交
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由 Paolo Bonzini 提交于
Merge tag 'kvm-arm-for-v4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master KVM/ARM Fixes for v4.7-rc6: Fixes a build issue without CONFIG_ARM_PMU and plugs pid leak on arm/arm64.
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- 27 6月, 2016 10 次提交
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由 Quentin Casasnovas 提交于
I couldn't get Xen to boot a L2 HVM when it was nested under KVM - it was getting a GP(0) on a rather unspecial vmread from Xen: (XEN) ----[ Xen-4.7.0-rc x86_64 debug=n Not tainted ]---- (XEN) CPU: 1 (XEN) RIP: e008:[<ffff82d0801e629e>] vmx_get_segment_register+0x14e/0x450 (XEN) RFLAGS: 0000000000010202 CONTEXT: hypervisor (d1v0) (XEN) rax: ffff82d0801e6288 rbx: ffff83003ffbfb7c rcx: fffffffffffab928 (XEN) rdx: 0000000000000000 rsi: 0000000000000000 rdi: ffff83000bdd0000 (XEN) rbp: ffff83000bdd0000 rsp: ffff83003ffbfab0 r8: ffff830038813910 (XEN) r9: ffff83003faf3958 r10: 0000000a3b9f7640 r11: ffff83003f82d418 (XEN) r12: 0000000000000000 r13: ffff83003ffbffff r14: 0000000000004802 (XEN) r15: 0000000000000008 cr0: 0000000080050033 cr4: 00000000001526e0 (XEN) cr3: 000000003fc79000 cr2: 0000000000000000 (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: 0000 cs: e008 (XEN) Xen code around <ffff82d0801e629e> (vmx_get_segment_register+0x14e/0x450): (XEN) 00 00 41 be 02 48 00 00 <44> 0f 78 74 24 08 0f 86 38 56 00 00 b8 08 68 00 (XEN) Xen stack trace from rsp=ffff83003ffbfab0: ... (XEN) Xen call trace: (XEN) [<ffff82d0801e629e>] vmx_get_segment_register+0x14e/0x450 (XEN) [<ffff82d0801f3695>] get_page_from_gfn_p2m+0x165/0x300 (XEN) [<ffff82d0801bfe32>] hvmemul_get_seg_reg+0x52/0x60 (XEN) [<ffff82d0801bfe93>] hvm_emulate_prepare+0x53/0x70 (XEN) [<ffff82d0801ccacb>] handle_mmio+0x2b/0xd0 (XEN) [<ffff82d0801be591>] emulate.c#_hvm_emulate_one+0x111/0x2c0 (XEN) [<ffff82d0801cd6a4>] handle_hvm_io_completion+0x274/0x2a0 (XEN) [<ffff82d0801f334a>] __get_gfn_type_access+0xfa/0x270 (XEN) [<ffff82d08012f3bb>] timer.c#add_entry+0x4b/0xb0 (XEN) [<ffff82d08012f80c>] timer.c#remove_entry+0x7c/0x90 (XEN) [<ffff82d0801c8433>] hvm_do_resume+0x23/0x140 (XEN) [<ffff82d0801e4fe7>] vmx_do_resume+0xa7/0x140 (XEN) [<ffff82d080164aeb>] context_switch+0x13b/0xe40 (XEN) [<ffff82d080128e6e>] schedule.c#schedule+0x22e/0x570 (XEN) [<ffff82d08012c0cc>] softirq.c#__do_softirq+0x5c/0x90 (XEN) [<ffff82d0801602c5>] domain.c#idle_loop+0x25/0x50 (XEN) (XEN) (XEN) **************************************** (XEN) Panic on CPU 1: (XEN) GENERAL PROTECTION FAULT (XEN) [error_code=0000] (XEN) **************************************** Tracing my host KVM showed it was the one injecting the GP(0) when emulating the VMREAD and checking the destination segment permissions in get_vmx_mem_address(): 3) | vmx_handle_exit() { 3) | handle_vmread() { 3) | nested_vmx_check_permission() { 3) | vmx_get_segment() { 3) 0.074 us | vmx_read_guest_seg_base(); 3) 0.065 us | vmx_read_guest_seg_selector(); 3) 0.066 us | vmx_read_guest_seg_ar(); 3) 1.636 us | } 3) 0.058 us | vmx_get_rflags(); 3) 0.062 us | vmx_read_guest_seg_ar(); 3) 3.469 us | } 3) | vmx_get_cs_db_l_bits() { 3) 0.058 us | vmx_read_guest_seg_ar(); 3) 0.662 us | } 3) | get_vmx_mem_address() { 3) 0.068 us | vmx_cache_reg(); 3) | vmx_get_segment() { 3) 0.074 us | vmx_read_guest_seg_base(); 3) 0.068 us | vmx_read_guest_seg_selector(); 3) 0.071 us | vmx_read_guest_seg_ar(); 3) 1.756 us | } 3) | kvm_queue_exception_e() { 3) 0.066 us | kvm_multiple_exception(); 3) 0.684 us | } 3) 4.085 us | } 3) 9.833 us | } 3) + 10.366 us | } Cross-checking the KVM/VMX VMREAD emulation code with the Intel Software Developper Manual Volume 3C - "VMREAD - Read Field from Virtual-Machine Control Structure", I found that we're enforcing that the destination operand is NOT located in a read-only data segment or any code segment when the L1 is in long mode - BUT that check should only happen when it is in protected mode. Shuffling the code a bit to make our emulation follow the specification allows me to boot a Xen dom0 in a nested KVM and start HVM L2 guests without problems. Fixes: f9eb4af6 ("KVM: nVMX: VMX instructions: add checks for #GP/#SS exceptions") Signed-off-by: NQuentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Eugene Korenevsky <ekorenevsky@gmail.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Marcelo Tosatti 提交于
The host timer which emulates the guest LAPIC TSC deadline timer has its expiration diminished by lapic_timer_advance_ns nanoseconds. Therefore if, at wait_lapic_expire, a difference larger than lapic_timer_advance_ns is encountered, delay at most lapic_timer_advance_ns. This fixes a problem where the guest can cause the host to delay for large amounts of time. Reported-by: NAlan Jenkins <alan.christopher.jenkins@gmail.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Marcelo Tosatti 提交于
Move the inline function nsec_to_cycles from x86.c to x86.h, as the next patch uses it from lapic.c. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Minfei Huang 提交于
There is a generic function __pvclock_read_cycles to be used to get both flags and cycles. For function pvclock_read_flags, it's useless to get cycles value. To make this function be more effective, get this variable flags directly in function. Signed-off-by: NMinfei Huang <mnghuan@gmail.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Minfei Huang 提交于
Function __pvclock_read_cycles is short enough, so there is no need to have another function pvclock_get_nsec_offset to calculate tsc delta. It's better to combine it into function __pvclock_read_cycles. Remove useless variables in function __pvclock_read_cycles. Signed-off-by: NMinfei Huang <mnghuan@gmail.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Minfei Huang 提交于
Protocol for the "version" fields is: hypervisor raises it (making it uneven) before it starts updating the fields and raises it again (making it even) when it is done. Thus the guest can make sure the time values it got are consistent by checking the version before and after reading them. Add CPU barries after getting version value just like what function vread_pvclock does, because all of callees in this function is inline. Fixes: 502dfeff Cc: stable@vger.kernel.org Signed-off-by: NMinfei Huang <mnghuan@gmail.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 James Morse 提交于
kvm provides kvm_vcpu_uninit(), which amongst other things, releases the last reference to the struct pid of the task that was last running the vcpu. On arm64 built with CONFIG_DEBUG_KMEMLEAK, starting a guest with kvmtool, then killing it with SIGKILL results (after some considerable time) in: > cat /sys/kernel/debug/kmemleak > unreferenced object 0xffff80007d5ea080 (size 128): > comm "lkvm", pid 2025, jiffies 4294942645 (age 1107.776s) > hex dump (first 32 bytes): > 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > backtrace: > [<ffff8000001b30ec>] create_object+0xfc/0x278 > [<ffff80000071da34>] kmemleak_alloc+0x34/0x70 > [<ffff80000019fa2c>] kmem_cache_alloc+0x16c/0x1d8 > [<ffff8000000d0474>] alloc_pid+0x34/0x4d0 > [<ffff8000000b5674>] copy_process.isra.6+0x79c/0x1338 > [<ffff8000000b633c>] _do_fork+0x74/0x320 > [<ffff8000000b66b0>] SyS_clone+0x18/0x20 > [<ffff800000085cb0>] el0_svc_naked+0x24/0x28 > [<ffffffffffffffff>] 0xffffffffffffffff On x86 kvm_vcpu_uninit() is called on the path from kvm_arch_destroy_vm(), on arm no equivalent call is made. Add the call to kvm_arch_vcpu_free(). Signed-off-by: NJames Morse <james.morse@arm.com> Fixes: 749cf76c ("KVM: ARM: Initial skeleton to compile KVM support") Cc: <stable@vger.kernel.org> # 3.10+ Acked-by: NMarc Zyngier <marc.zyngier@arm.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Sudeep Holla 提交于
When CONFIG_ARM_PMU is disabled, we get the following build error: arch/arm64/kvm/sys_regs.c: In function 'pmu_counter_idx_valid': arch/arm64/kvm/sys_regs.c:564:27: error: 'ARMV8_PMU_CYCLE_IDX' undeclared (first use in this function) if (idx >= val && idx != ARMV8_PMU_CYCLE_IDX) ^ arch/arm64/kvm/sys_regs.c:564:27: note: each undeclared identifier is reported only once for each function it appears in arch/arm64/kvm/sys_regs.c: In function 'access_pmu_evcntr': arch/arm64/kvm/sys_regs.c:592:10: error: 'ARMV8_PMU_CYCLE_IDX' undeclared (first use in this function) idx = ARMV8_PMU_CYCLE_IDX; ^ arch/arm64/kvm/sys_regs.c: In function 'access_pmu_evtyper': arch/arm64/kvm/sys_regs.c:638:14: error: 'ARMV8_PMU_CYCLE_IDX' undeclared (first use in this function) if (idx == ARMV8_PMU_CYCLE_IDX) ^ arch/arm64/kvm/hyp/switch.c:86:15: error: 'ARMV8_PMU_USERENR_MASK' undeclared (first use in this function) write_sysreg(ARMV8_PMU_USERENR_MASK, pmuserenr_el0); This patch fixes the build with CONFIG_ARM_PMU disabled. Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: NSudeep Holla <sudeep.holla@arm.com> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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由 Linus Torvalds 提交于
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi由 Linus Torvalds 提交于
Pull SCSI fixes from James Bottomley: "Two straightforward fixes. One is a concurrency issue only affecting SAS connected SATA drives, but which could hang the storage subsystem if it triggers (because the outstanding command count on error never goes back to zero) and the other is a NO_TAG fallout from the switch to hostwide tags which causes the system to crash on module insertion (we've checked carefully and only the 53c700 family of drivers is vulnerable to this issue)" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: 53c700: fix BUG on untagged commands scsi: fix race between simultaneous decrements of ->host_failed
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- 25 6月, 2016 29 次提交
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由 Linus Torvalds 提交于
Merge branch 'for-linus-4.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs fixes part 2 from Chris Mason: "This has one patch from Omar to bring iterate_shared back to btrfs. We have a tree of work we queue up for directory items and it doesn't lend itself well to shared access. While we're cleaning it up, Omar has changed things to use an exclusive lock when there are delayed items" * 'for-linus-4.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: fix ->iterate_shared() by upgrading i_rwsem for delayed nodes
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs由 Linus Torvalds 提交于
Pull btrfs fixes from Chris Mason: "I have a two part pull this time because one of the patches Dave Sterba collected needed to be against v4.7-rc2 or higher (we used rc4). I try to make my for-linus-xx branch testable on top of the last major so we can hand fixes to people on the list more easily, so I've split this pull in two. This first part has some fixes and two performance improvements that we've been testing for some time. Josef's two performance fixes are most notable. The transid tracking patch makes a big improvement on pretty much every workload" * 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: Force stripesize to the value of sectorsize btrfs: fix disk_i_size update bug when fallocate() fails Btrfs: fix error handling in map_private_extent_buffer Btrfs: fix error return code in btrfs_init_test_fs() Btrfs: don't do nocow check unless we have to btrfs: fix deadlock in delayed_ref_async_start Btrfs: track transid for delayed ref flushing
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound由 Linus Torvalds 提交于
Pull sound fixes from Takashi Iwai: "Again pretty calm weeks: we've had only a few trivial / stable HD-audio fixes in addition to a possible race fix for snd-dummy driver spotted by syzkaller" * tag 'sound-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: dummy: Fix a use-after-free at closing ALSA: hda / realtek - add two more Thinkpad IDs (5050,5053) for tpt460 fixup ALSA: hda - Fix the headset mic jack detection on Dell machine ALSA: hda/tegra: iomem fixups for sparse warnings ALSA: hdac_regmap - fix the register access for runtime PM
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull x86 kprobe fix from Thomas Gleixner: "A single fix clearing the TF bit when a fault is single stepped" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: kprobes/x86: Clear TF bit in fault on single-stepping
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull scheduler fixes from Thomas Gleixner: "A couple of scheduler fixes: - force watchdog reset while processing sysrq-w - fix a deadlock when enabling trace events in the scheduler - fixes to the throttled next buddy logic - fixes for the average accounting (missing serialization and underflow handling) - allow kernel threads for fallback to online but not active cpus" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/core: Allow kthreads to fall back to online && !active cpus sched/fair: Do not announce throttled next buddy in dequeue_task_fair() sched/fair: Initialize throttle_count for new task-groups lazily sched/fair: Fix cfs_rq avg tracking underflow kernel/sysrq, watchdog, sched/core: Reset watchdog on all CPUs while processing sysrq-w sched/debug: Fix deadlock when enabling sched events sched/fair: Fix post_init_entity_util_avg() serialization
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由 Omar Sandoval 提交于
Commit fe742fd4 ("Revert "btrfs: switch to ->iterate_shared()"") backed out the conversion to ->iterate_shared() for Btrfs because the delayed inode handling in btrfs_real_readdir() is racy. However, we can still do readdir in parallel if there are no delayed nodes. This is a temporary fix which upgrades the shared inode lock to an exclusive lock only when we have delayed items until we come up with a more complete solution. While we're here, rename the btrfs_{get,put}_delayed_items functions to make it very clear that they're just for readdir. Tested with xfstests and by doing a parallel kernel build: while make tinyconfig && make -j4 && git clean dqfx; do : done along with a bunch of parallel finds in another shell: while true; do for ((i=0; i<4; i++)); do find . >/dev/null & done wait done Signed-off-by: NOmar Sandoval <osandov@fb.com> Signed-off-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NChris Mason <clm@fb.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull locking fix from Thomas Gleixner: "A single fix to address a race in the static key logic" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/static_key: Fix concurrent static_key_slow_inc()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull irq fix from Thomas Gleixner: "A single fix for the fallout from the conversion of MIPS GIC to irq domains" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/mips-gic: Fix IRQs in gic_dev_domain
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux由 Linus Torvalds 提交于
Pull powerpc fixes from Michael Ellerman: "mm/radix (Aneesh Kumar K.V): - Update to tlb functions ric argument - Flush page walk cache when freeing page table - Update Radix tree size as per ISA 3.0 mm/hash (Aneesh Kumar K.V): - Use the correct PPP mask when updating HPTE - Don't add memory coherence if cache inhibited is set eeh (Gavin Shan): - Fix invalid cached PE primary bus bpf/jit (Naveen N. Rao): - Disable classic BPF JIT on ppc64le .. and fix faults caused by radix patching of SLB miss handler (Michael Ellerman)" * tag 'powerpc-4.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/bpf/jit: Disable classic BPF JIT on ppc64le powerpc: Fix faults caused by radix patching of SLB miss handler powerpc/eeh: Fix invalid cached PE primary bus powerpc/mm/radix: Update Radix tree size as per ISA 3.0 powerpc/mm/hash: Don't add memory coherence if cache inhibited is set powerpc/mm/hash: Use the correct PPP mask when updating HPTE powerpc/mm/radix: Flush page walk cache when freeing page table powerpc/mm/radix: Update to tlb functions ric argument
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由 Michael Ellerman 提交于
Commit b235beea ("Clarify naming of thread info/stack allocators") breaks the build on some powerpc configs, where THREAD_SIZE < PAGE_SIZE: kernel/fork.c:235:2: error: implicit declaration of function 'free_thread_stack' kernel/fork.c:355:8: error: assignment from incompatible pointer type stack = alloc_thread_stack_node(tsk, node); ^ Fix it by renaming free_stack() to free_thread_stack(), and updating the return type of alloc_thread_stack_node(). Fixes: b235beea ("Clarify naming of thread info/stack allocators") Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Linus Torvalds 提交于
Merge misc fixes from Andrew Morton: "Two weeks worth of fixes here" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (41 commits) init/main.c: fix initcall_blacklisted on ia64, ppc64 and parisc64 autofs: don't get stuck in a loop if vfs_write() returns an error mm/page_owner: avoid null pointer dereference tools/vm/slabinfo: fix spelling mistake: "Ocurrences" -> "Occurrences" fs/nilfs2: fix potential underflow in call to crc32_le oom, suspend: fix oom_reaper vs. oom_killer_disable race ocfs2: disable BUG assertions in reading blocks mm, compaction: abort free scanner if split fails mm: prevent KASAN false positives in kmemleak mm/hugetlb: clear compound_mapcount when freeing gigantic pages mm/swap.c: flush lru pvecs on compound page arrival memcg: css_alloc should return an ERR_PTR value on error memcg: mem_cgroup_migrate() may be called with irq disabled hugetlb: fix nr_pmds accounting with shared page tables Revert "mm: disable fault around on emulated access bit architecture" Revert "mm: make faultaround produce old ptes" mailmap: add Boris Brezillon's email mailmap: add Antoine Tenart's email mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask mm: mempool: kasan: don't poot mempool objects in quarantine ...
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git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma由 Linus Torvalds 提交于
Pull rdma fixes from Doug Ledford: "This is the second batch of queued up rdma patches for this rc cycle. There isn't anything really major in here. It's passed 0day, linux-next, and local testing across a wide variety of hardware. There are still a few known issues to be tracked down, but this should amount to the vast majority of the rdma RC fixes. Round two of 4.7 rc fixes: - A couple minor fixes to the rdma core - Multiple minor fixes to hfi1 - Multiple minor fixes to mlx4/mlx4 - A few minor fixes to i40iw" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (31 commits) IB/srpt: Reduce QP buffer size i40iw: Enable level-1 PBL for fast memory registration i40iw: Return correct max_fast_reg_page_list_len i40iw: Correct status check on i40iw_get_pble i40iw: Correct CQ arming IB/rdmavt: Correct qp_priv_alloc() return value test IB/hfi1: Don't zero out qp->s_ack_queue in rvt_reset_qp IB/hfi1: Fix deadlock with txreq allocation slow path IB/mlx4: Prevent cross page boundary allocation IB/mlx4: Fix memory leak if QP creation failed IB/mlx4: Verify port number in flow steering create flow IB/mlx4: Fix error flow when sending mads under SRIOV IB/mlx4: Fix the SQ size of an RC QP IB/mlx5: Fix wrong naming of port_rcv_data counter IB/mlx5: Fix post send fence logic IB/uverbs: Initialize ib_qp_init_attr with zeros IB/core: Fix false search of the IB_SA_WELL_KNOWN_GUID IB/core: Fix RoCE v1 multicast join logic issue IB/core: Fix no default GIDs when netdevice reregisters IB/hfi1: Send a pkey change event on driver pkey update ...
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid由 Linus Torvalds 提交于
Pull HID fix from Jiri Kosina: "hiddev ioctl() validation fix from Scott Bauer" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands
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由 Linus Torvalds 提交于
Merge tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon fix from Guenter Roeck: "Improve fan type detection for dell-smm to prevent kernel hang" * tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (dell-smm) Cache fan_type() calls and change fan detection
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm由 Linus Torvalds 提交于
Pull ACPI fix from Rafael Wysocki: "Stable-candidate fix for a deadlock in ACPICA introduced during the 4.5 development cycle by a commit attempting to improve the handling of AML code that doesn't belong to any namespace objects in a given definition block (Lv Zheng)" * tag 'acpi-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPICA: Namespace: Fix deadlock triggered by MLC support in dynamic table loading
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm由 Linus Torvalds 提交于
Pull power management fixes from Rafael Wysocki: "Fix for a latent cpufreq driver bug uncovered by a recent ACPICA change and several fixes for the devfreq framework, including one fix for an issue introduced recently. Specifics: - Fix a latent initialization issue in the pcc-cpufreq driver (incorrect initial value of a structure field) that has been uncovered by a recent ACPICA commit (Mike Galbraith). - Add a missing notification in an update_devfreq() error code path forgotten by a recent devfreq commit (Chanwoo Choi). - Fix devfreq device frequency initialization (Lukasz Luba). - Fix an incorrect IS_ERR() check in the devfreq framework discovered by the Smatch checker (Dan Carpenter). - Drop two excessive put_device() calls from the devfreq framework (MyungJoo Ham, Cai Zhiyong). - Fix a possible memory leak in the devfreq framework and drop an unnecessary kfree() invocation from it (MyungJoo Ham)" * tag 'pm-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed cpufreq: pcc-cpufreq: Fix doorbell.access_width PM / devfreq: fix initialization of current frequency in last status PM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check PM / devfreq: remove double put_device PM / devfreq: fix double call put_device PM / devfreq: fix duplicated kfree on devfreq pointer PM / devfreq: devm_kzalloc to have dev pointer more precisely
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip由 Linus Torvalds 提交于
Pull xen bug fixes from David Vrabel: - fix x86 PV dom0 crash during early boot on some hardware - fix two pciback bugs affects certain devices - fix potential overflow when clearing page tables in x86 PV * tag 'for-linus-4.7b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen-pciback: return proper values during BAR sizing x86/xen: avoid m2p lookup when setting early page table entries xen/pciback: Fix conf_space read/write overlap check. x86/xen: fix upper bound of pmd loop in xen_cleanhighmap() xen/balloon: Fix declared-but-not-defined warning
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux由 Linus Torvalds 提交于
Pull arm64 fixes from Will Deacon: "Here are a few more arm64 fixes, but things do finally appear to be slowing down. The main fix is avoiding hibernation in a previously unanticipated situation where we have CPUs parked in the kernel, but it's all good stuff. - Fix icache/dcache sync for anonymous pages under migration - Correct the ASID limit check - Fix parallel builds of Image and Image.gz - Refuse to hibernate when we have CPUs that we can't offline" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: hibernate: Don't hibernate on systems with stuck CPUs arm64: smp: Add function to determine if cpus are stuck in the kernel arm64: mm: remove page_mapping check in __sync_icache_dcache arm64: fix boot image dependencies to not generate invalid images arm64: update ASID limit
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由 Rasmus Villemoes 提交于
When I replaced kasprintf("%pf") with a direct call to sprint_symbol_no_offset I must have broken the initcall blacklisting feature on the arches where dereference_function_descriptor() is non-trivial. Fixes: c8cdd2be (init/main.c: simplify initcall_blacklisted()) Link: http://lkml.kernel.org/r/1466027283-4065-1-git-send-email-linux@rasmusvillemoes.dkSigned-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Yang Shi <yang.shi@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Petr Mladek <pmladek@suse.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Andrey Vagin 提交于
__vfs_write() returns a negative value in a error case. Link: http://lkml.kernel.org/r/20160616083108.6278.65815.stgit@pluto.themaw.netSigned-off-by: NAndrey Vagin <avagin@openvz.org> Signed-off-by: NIan Kent <raven@themaw.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Sudip Mukherjee 提交于
We have dereferenced page_ext before checking it. Lets check it first and then used it. Fixes: f86e4271 ("mm: check the return value of lookup_page_ext for all call sites") Link: http://lkml.kernel.org/r/1465249059-7883-1-git-send-email-sudipm.mukherjee@gmail.comSigned-off-by: NSudip Mukherjee <sudip.mukherjee@codethink.co.uk> Acked-by: NVlastimil Babka <vbabka@suse.cz> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Colin Ian King 提交于
trivial fix to spelling mistake Link: http://lkml.kernel.org/r/1466672144-831-1-git-send-email-colin.king@canonical.comSigned-off-by: NColin Ian King <colin.king@canonical.com> Acked-by: NChristoph Lameter <cl@linux.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Torsten Hilbrich 提交于
The value `bytes' comes from the filesystem which is about to be mounted. We cannot trust that the value is always in the range we expect it to be. Check its value before using it to calculate the length for the crc32_le call. It value must be larger (or equal) sumoff + 4. This fixes a kernel bug when accidentially mounting an image file which had the nilfs2 magic value 0x3434 at the right offset 0x406 by chance. The bytes 0x01 0x00 were stored at 0x408 and were interpreted as a s_bytes value of 1. This caused an underflow when substracting sumoff + 4 (20) in the call to crc32_le. BUG: unable to handle kernel paging request at ffff88021e600000 IP: crc32_le+0x36/0x100 ... Call Trace: nilfs_valid_sb.part.5+0x52/0x60 [nilfs2] nilfs_load_super_block+0x142/0x300 [nilfs2] init_nilfs+0x60/0x390 [nilfs2] nilfs_mount+0x302/0x520 [nilfs2] mount_fs+0x38/0x160 vfs_kern_mount+0x67/0x110 do_mount+0x269/0xe00 SyS_mount+0x9f/0x100 entry_SYSCALL_64_fastpath+0x16/0x71 Link: http://lkml.kernel.org/r/1466778587-5184-2-git-send-email-konishi.ryusuke@lab.ntt.co.jpSigned-off-by: NTorsten Hilbrich <torsten.hilbrich@secunet.com> Tested-by: NTorsten Hilbrich <torsten.hilbrich@secunet.com> Signed-off-by: NRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: <stable@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Michal Hocko 提交于
Tetsuo has reported the following potential oom_killer_disable vs. oom_reaper race: (1) freeze_processes() starts freezing user space threads. (2) Somebody (maybe a kenrel thread) calls out_of_memory(). (3) The OOM killer calls mark_oom_victim() on a user space thread P1 which is already in __refrigerator(). (4) oom_killer_disable() sets oom_killer_disabled = true. (5) P1 leaves __refrigerator() and enters do_exit(). (6) The OOM reaper calls exit_oom_victim(P1) before P1 can call exit_oom_victim(P1). (7) oom_killer_disable() returns while P1 not yet finished (8) P1 perform IO/interfere with the freezer. This situation is unfortunate. We cannot move oom_killer_disable after all the freezable kernel threads are frozen because the oom victim might depend on some of those kthreads to make a forward progress to exit so we could deadlock. It is also far from trivial to teach the oom_reaper to not call exit_oom_victim() because then we would lose a guarantee of the OOM killer and oom_killer_disable forward progress because exit_mm->mmput might block and never call exit_oom_victim. It seems the easiest way forward is to workaround this race by calling try_to_freeze_tasks again after oom_killer_disable. This will make sure that all the tasks are frozen or it bails out. Fixes: 449d777d ("mm, oom_reaper: clear TIF_MEMDIE for all tasks queued for oom_reaper") Link: http://lkml.kernel.org/r/1466597634-16199-1-git-send-email-mhocko@kernel.orgSigned-off-by: NMichal Hocko <mhocko@suse.com> Reported-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Gang He 提交于
According to some high-load testing, these two BUG assertions were encountered, this led system panic. Actually, there were some discussions about removing these two BUG() assertions, it would not bring any side effect. Then, I did the the following changes, 1) use the existing macro CATCH_BH_JBD_RACES to wrap BUG() in the ocfs2_read_blocks_sync function like before. 2) disable the macro CATCH_BH_JBD_RACES in Makefile by default. Link: http://lkml.kernel.org/r/1466574294-26863-1-git-send-email-ghe@suse.comSigned-off-by: NGang He <ghe@suse.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <joseph.qi@huawei.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Rientjes 提交于
If the memory compaction free scanner cannot successfully split a free page (only possible due to per-zone low watermark), terminate the free scanner rather than continuing to scan memory needlessly. If the watermark is insufficient for a free page of order <= cc->order, then terminate the scanner since all future splits will also likely fail. This prevents the compaction freeing scanner from scanning all memory on very large zones (very noticeable for zones > 128GB, for instance) when all splits will likely fail while holding zone->lock. compaction_alloc() iterating a 128GB zone has been benchmarked to take over 400ms on some systems whereas any free page isolated and ready to be split ends up failing in split_free_page() because of the low watermark check and thus the iteration continues. The next time compaction occurs, the freeing scanner will likely start at the end of the zone again since no success was made previously and we get the same lengthy iteration until the zone is brought above the low watermark. All thp page faults can take >400ms in such a state without this fix. Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1606211820350.97086@chino.kir.corp.google.comSigned-off-by: NDavid Rientjes <rientjes@google.com> Acked-by: NVlastimil Babka <vbabka@suse.cz> Cc: Minchan Kim <minchan@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Hugh Dickins <hughd@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Dmitry Vyukov 提交于
When kmemleak dumps contents of leaked objects it reads whole objects regardless of user-requested size. This upsets KASAN. Disable KASAN checks around object dump. Link: http://lkml.kernel.org/r/1466617631-68387-1-git-send-email-dvyukov@google.comSigned-off-by: NDmitry Vyukov <dvyukov@google.com> Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Gerald Schaefer 提交于
While working on s390 support for gigantic hugepages I ran into the following "Bad page state" warning when freeing gigantic pages: BUG: Bad page state in process bash pfn:580001 page:000003d116000040 count:0 mapcount:0 mapping:ffffffff00000000 index:0x0 flags: 0x7fffc0000000000() page dumped because: non-NULL mapping This is because page->compound_mapcount, which is part of a union with page->mapping, is initialized with -1 in prep_compound_gigantic_page(), and not cleared again during destroy_compound_gigantic_page(). Fix this by clearing the compound_mapcount in destroy_compound_gigantic_page() before clearing compound_head. Interestingly enough, the warning will not show up on x86_64, although this should not be architecture specific. Apparently there is an endianness issue, combined with the fact that the union contains both a 64 bit ->mapping pointer and a 32 bit atomic_t ->compound_mapcount as members. The resulting bogus page->mapping on x86_64 therefore contains 00000000ffffffff instead of ffffffff00000000 on s390, which will falsely trigger the PageAnon() check in free_pages_prepare() because page->mapping & PAGE_MAPPING_ANON is true on little-endian architectures like x86_64 in this case (the page is not compound anymore, ->compound_head was already cleared before). As a result, page->mapping will be cleared before doing the checks in free_pages_check(). Not sure if the bogus "PageAnon() returning true" on x86_64 for the first tail page of a gigantic page (at this stage) has other theoretical implications, but they would also be fixed with this patch. Link: http://lkml.kernel.org/r/1466612719-5642-1-git-send-email-gerald.schaefer@de.ibm.comSigned-off-by: NGerald Schaefer <gerald.schaefer@de.ibm.com> Reviewed-by: NMike Kravetz <mike.kravetz@oracle.com> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Lukasz Odzioba 提交于
Currently we can have compound pages held on per cpu pagevecs, which leads to a lot of memory unavailable for reclaim when needed. In the systems with hundreads of processors it can be GBs of memory. On of the way of reproducing the problem is to not call munmap explicitly on all mapped regions (i.e. after receiving SIGTERM). After that some pages (with THP enabled also huge pages) may end up on lru_add_pvec, example below. void main() { #pragma omp parallel { size_t size = 55 * 1000 * 1000; // smaller than MEM/CPUS void *p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS , -1, 0); if (p != MAP_FAILED) memset(p, 0, size); //munmap(p, size); // uncomment to make the problem go away } } When we run it with THP enabled it will leave significant amount of memory on lru_add_pvec. This memory will be not reclaimed if we hit OOM, so when we run above program in a loop: for i in `seq 100`; do ./a.out; done many processes (95% in my case) will be killed by OOM. The primary point of the LRU add cache is to save the zone lru_lock contention with a hope that more pages will belong to the same zone and so their addition can be batched. The huge page is already a form of batched addition (it will add 512 worth of memory in one go) so skipping the batching seems like a safer option when compared to a potential excess in the caching which can be quite large and much harder to fix because lru_add_drain_all is way to expensive and it is not really clear what would be a good moment to call it. Similarly we can reproduce the problem on lru_deactivate_pvec by adding: madvise(p, size, MADV_FREE); after memset. This patch flushes lru pvecs on compound page arrival making the problem less severe - after applying it kill rate of above example drops to 0%, due to reducing maximum amount of memory held on pvec from 28MB (with THP) to 56kB per CPU. Suggested-by: NMichal Hocko <mhocko@suse.com> Link: http://lkml.kernel.org/r/1466180198-18854-1-git-send-email-lukasz.odzioba@intel.comSigned-off-by: NLukasz Odzioba <lukasz.odzioba@intel.com> Acked-by: NMichal Hocko <mhocko@suse.com> Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Ming Li <mingli199x@qq.com> Cc: Minchan Kim <minchan@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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