- 08 8月, 2015 3 次提交
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging由 Linus Torvalds 提交于
Pull staging driver fixes from Greg KH: "Here are three bugfixes for some staging driver issues that have been reported. All have been in the linux-next tree for a while" * tag 'staging-4.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: lustre: Include unaligned.h instead of access_ok.h staging: vt6655: vnt_bss_info_changed check conf->beacon_rate is not NULL staging: comedi: das1800: add missing break in switch
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc由 Linus Torvalds 提交于
Pull char/misc fixes from Greg KH: "Here are some extcon fixes for 4.2-rc6 that resolve some reported problems. All have been in linux-next for a while" * tag 'char-misc-4.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: extcon: Fix extcon_cable_get_state() from getting old state after notification extcon: Fix hang and extcon_get/set_cable_state(). extcon: palmas: Fix NULL pointer error
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git://anongit.freedesktop.org/drm-intel由 Linus Torvalds 提交于
Pull drm fixes from Daniel Vetter: "One i915 regression fix and a drm core one since Dave's not around, both introduced in 4.2 so not cc: stable. The fix for the warning Ted reported isn't in here yet since he didn't yet supply a tested-by and I can't repro this one myself (it's in fixup code that needs firmware doing something i915 wouldn't do)" * tag 'drm-intel-fixes-2015-08-07' of git://anongit.freedesktop.org/drm-intel: drm/vblank: Use u32 consistently for vblank counters drm/i915: Allow parsing of variable size child device entries from VBT
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- 07 8月, 2015 27 次提交
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由 Daniel Vetter 提交于
In commit 99264a61 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Wed Apr 15 19:34:43 2015 +0200 drm/vblank: Fixup and document timestamp update/read barriers I've switched vblank->count from atomic_t to unsigned long and accidentally created an integer comparison bug in drm_vblank_count_and_time since vblanke->count might overflow the u32 local copy and hence the retry loop never succeed. Fix this by consistently using u32. Cc: Michel Dänzer <michel@daenzer.net> Reported-by: NMichel Dänzer <michel@daenzer.net> Reviewed-by: NThierry Reding <treding@nvidia.com> Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc由 Linus Torvalds 提交于
Pull sparc fix from David Miller: "FPU register corruption bug fix" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc64: Fix userspace FPU register corruptions.
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由 Linus Torvalds 提交于
Merge fixes from Andrew Morton: "21 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (21 commits) writeback: fix initial dirty limit mm/memory-failure: set PageHWPoison before migrate_pages() mm: check __PG_HWPOISON separately from PAGE_FLAGS_CHECK_AT_* mm/memory-failure: give up error handling for non-tail-refcounted thp mm/memory-failure: fix race in counting num_poisoned_pages mm/memory-failure: unlock_page before put_page ipc: use private shmem or hugetlbfs inodes for shm segments. mm: initialize hotplugged pages as reserved ocfs2: fix shift left overflow kthread: export kthread functions fsnotify: fix oops in fsnotify_clear_marks_by_group_flags() lib/iommu-common.c: do not use 0xffffffffffffffffl for computing align_mask mm/slub: allow merging when SLAB_DEBUG_FREE is set signalfd: fix information leak in signalfd_copyinfo signal: fix information leak in copy_siginfo_to_user signal: fix information leak in copy_siginfo_from_user32 ocfs2: fix BUG in ocfs2_downconvert_thread_do_work() fs, file table: reinit files_stat.max_files after deferred memory initialisation mm, meminit: replace rwsem with completion mm, meminit: allow early_pfn_to_nid to be used during runtime ...
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由 David S. Miller 提交于
If we have a series of events from userpsace, with %fprs=FPRS_FEF, like follows: ETRAP ETRAP VIS_ENTRY(fprs=0x4) VIS_EXIT RTRAP (kernel FPU restore with fpu_saved=0x4) RTRAP We will not restore the user registers that were clobbered by the FPU using kernel code in the inner-most trap. Traps allocate FPU save slots in the thread struct, and FPU using sequences save the "dirty" FPU registers only. This works at the initial trap level because all of the registers get recorded into the top-level FPU save area, and we'll return to userspace with the FPU disabled so that any FPU use by the user will take an FPU disabled trap wherein we'll load the registers back up properly. But this is not how trap returns from kernel to kernel operate. The simplest fix for this bug is to always save all FPU register state for anything other than the top-most FPU save area. Getting rid of the optimized inner-slot FPU saving code ends up making VISEntryHalf degenerate into plain VISEntry. Longer term we need to do something smarter to reinstate the partial save optimizations. Perhaps the fundament error is having trap entry and exit allocate FPU save slots and restore register state. Instead, the VISEntry et al. calls should be doing that work. This bug is about two decades old. Reported-by: NJames Y Knight <jyknight@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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git://people.freedesktop.org/~agd5f/linux由 Linus Torvalds 提交于
Pull amdgpu fixes from Alex Deucher: "Just a few amdgpu fixes to make sure we report the proper firmware information and number of render buffers to userspace and a typo in a debugging function" [ Pulling directly from Alex since Dave Airlie is on vacation - Linus ] * 'drm-fixes-4.2' of git://people.freedesktop.org/~agd5f/linux: drm/amdgpu: set fw_version and feature_version for smu fw loading drm/amdgpu: add feature version for SDMA ucode drm/amdgpu: add feature version for RLC and MEC v2 drm/amdgpu: increment queue when iterating on this variable. drm/amdgpu: fix rb setting for CZ
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git://ftp.arm.linux.org.uk/~rmk/linux-arm由 Linus Torvalds 提交于
Pull TDA998x i2c driver fixes from Russell King: "This fixes the double-checksumming of the AVI infoframe which was resulting in the checksum always being zero. It went unnoticed as none of my HDMI devices had a problem with this" [ Pulling directly from rmk since Dave Airlie is on vacation - Linus ] * 'drm-tda998x-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: drm/i2c: tda998x: fix bad checksum of the HDMI AVI infoframe
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由 Rabin Vincent 提交于
The initial value of global_wb_domain.dirty_limit set by writeback_set_ratelimit() is zeroed out by the memset in wb_domain_init(). Signed-off-by: NRabin Vincent <rabin.vincent@axis.com> Acked-by: NTejun Heo <tj@kernel.org> Cc: Jens Axboe <axboe@fb.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Naoya Horiguchi 提交于
Now page freeing code doesn't consider PageHWPoison as a bad page, so by setting it before completing the page containment, we can prevent the error page from being reused just after successful page migration. I added TTU_IGNORE_HWPOISON for try_to_unmap() to make sure that the page table entry is transformed into migration entry, not to hwpoison entry. Signed-off-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dean Nelson <dnelson@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Hugh Dickins <hughd@google.com> Cc: David Rientjes <rientjes@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 Naoya Horiguchi 提交于
The race condition addressed in commit add05cec ("mm: soft-offline: don't free target page in successful page migration") was not closed completely, because that can happen not only for soft-offline, but also for hard-offline. Consider that a slab page is about to be freed into buddy pool, and then an uncorrected memory error hits the page just after entering __free_one_page(), then VM_BUG_ON_PAGE(page->flags & PAGE_FLAGS_CHECK_AT_PREP) is triggered, despite the fact that it's not necessary because the data on the affected page is not consumed. To solve it, this patch drops __PG_HWPOISON from page flag checks at allocation/free time. I think it's justified because __PG_HWPOISON flags is defined to prevent the page from being reused, and setting it outside the page's alloc-free cycle is a designed behavior (not a bug.) For recent months, I was annoyed about BUG_ON when soft-offlined page remains on lru cache list for a while, which is avoided by calling put_page() instead of putback_lru_page() in page migration's success path. This means that this patch reverts a major change from commit add05cec about the new refcounting rule of soft-offlined pages, so "reuse window" revives. This will be closed by a subsequent patch. Signed-off-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dean Nelson <dnelson@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Hugh Dickins <hughd@google.com> Cc: David Rientjes <rientjes@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 Naoya Horiguchi 提交于
"non anonymous thp" case is still racy with freeing thp, which causes panic due to put_page() for refcount-0 page. It seems that closing up this race might be hard (and/or not worth doing,) so let's give up the error handling for this case. Signed-off-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dean Nelson <dnelson@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Hugh Dickins <hughd@google.com> Cc: David Rientjes <rientjes@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 Naoya Horiguchi 提交于
When memory_failure() is called on a page which are just freed after page migration from soft offlining, the counter num_poisoned_pages is raised twi= ce. So let's fix it with using TestSetPageHWPoison. Signed-off-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dean Nelson <dnelson@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Hugh Dickins <hughd@google.com> Cc: David Rientjes <rientjes@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 Naoya Horiguchi 提交于
Recently I addressed a few of hwpoison race problems and the patches are merged on v4.2-rc1. It made progress, but unfortunately some problems still remain due to less coverage of my testing. So I'm trying to fix or avoid them in this series. One point I'm expecting to discuss is that patch 4/5 changes the page flag set to be checked on free time. In current behavior, __PG_HWPOISON is not supposed to be set when the page is freed. I think that there is no strong reason for this behavior, and it causes a problem hard to fix only in error handler side (because __PG_HWPOISON could be set at arbitrary timing.) So I suggest to change it. With this patchset, hwpoison stress testing in official mce-test testsuite (which previously failed) passes. This patch (of 5): In "just unpoisoned" path, we do put_page and then unlock_page, which is a wrong order and causes "freeing locked page" bug. So let's fix it. Signed-off-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dean Nelson <dnelson@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Hugh Dickins <hughd@google.com> Acked-by: NDavid Rientjes <rientjes@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 Stephen Smalley 提交于
The shm implementation internally uses shmem or hugetlbfs inodes for shm segments. As these inodes are never directly exposed to userspace and only accessed through the shm operations which are already hooked by security modules, mark the inodes with the S_PRIVATE flag so that inode security initialization and permission checking is skipped. This was motivated by the following lockdep warning: ====================================================== [ INFO: possible circular locking dependency detected ] 4.2.0-0.rc3.git0.1.fc24.x86_64+debug #1 Tainted: G W ------------------------------------------------------- httpd/1597 is trying to acquire lock: (&ids->rwsem){+++++.}, at: shm_close+0x34/0x130 but task is already holding lock: (&mm->mmap_sem){++++++}, at: SyS_shmdt+0x4b/0x180 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&mm->mmap_sem){++++++}: lock_acquire+0xc7/0x270 __might_fault+0x7a/0xa0 filldir+0x9e/0x130 xfs_dir2_block_getdents.isra.12+0x198/0x1c0 [xfs] xfs_readdir+0x1b4/0x330 [xfs] xfs_file_readdir+0x2b/0x30 [xfs] iterate_dir+0x97/0x130 SyS_getdents+0x91/0x120 entry_SYSCALL_64_fastpath+0x12/0x76 -> #2 (&xfs_dir_ilock_class){++++.+}: lock_acquire+0xc7/0x270 down_read_nested+0x57/0xa0 xfs_ilock+0x167/0x350 [xfs] xfs_ilock_attr_map_shared+0x38/0x50 [xfs] xfs_attr_get+0xbd/0x190 [xfs] xfs_xattr_get+0x3d/0x70 [xfs] generic_getxattr+0x4f/0x70 inode_doinit_with_dentry+0x162/0x670 sb_finish_set_opts+0xd9/0x230 selinux_set_mnt_opts+0x35c/0x660 superblock_doinit+0x77/0xf0 delayed_superblock_init+0x10/0x20 iterate_supers+0xb3/0x110 selinux_complete_init+0x2f/0x40 security_load_policy+0x103/0x600 sel_write_load+0xc1/0x750 __vfs_write+0x37/0x100 vfs_write+0xa9/0x1a0 SyS_write+0x58/0xd0 entry_SYSCALL_64_fastpath+0x12/0x76 ... Signed-off-by: NStephen Smalley <sds@tycho.nsa.gov> Reported-by: NMorten Stevens <mstevens@fedoraproject.org> Acked-by: NHugh Dickins <hughd@google.com> Acked-by: NPaul Moore <paul@paul-moore.com> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Eric Paris <eparis@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Mel Gorman 提交于
Commit 92923ca3 ("mm: meminit: only set page reserved in the memblock region") broke memory hotplug which expects the memmap for newly added sections to be reserved until onlined by online_pages_range(). This patch marks hotplugged pages as reserved when adding new zones. Signed-off-by: NMel Gorman <mgorman@suse.de> Reported-by: NDavid Vrabel <david.vrabel@citrix.com> Tested-by: NDavid Vrabel <david.vrabel@citrix.com> Cc: Nathan Zimmer <nzimmer@sgi.com> Cc: Robin Holt <holt@sgi.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joseph Qi 提交于
When using a large volume, for example 9T volume with 2T already used, frequent creation of small files with O_DIRECT when the IO is not cluster aligned may clear sectors in the wrong place. This will cause filesystem corruption. This is because p_cpos is a u32. When calculating the corresponding sector it should be converted to u64 first, otherwise it may overflow. Signed-off-by: NJoseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: <stable@vger.kernel.org> [4.0+] Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Kershner 提交于
The s-Par visornic driver, currently in staging, processes a queue being serviced by the an s-Par service partition. We can get a message that something has happened with the Service Partition, when that happens, we must not access the channel until we get a message that the service partition is back again. The visornic driver has a thread for processing the channel, when we get the message, we need to be able to park the thread and then resume it when the problem clears. We can do this with kthread_park and unpark but they are not exported from the kernel, this patch exports the needed functions. Signed-off-by: NDavid Kershner <david.kershner@unisys.com> Acked-by: NIngo Molnar <mingo@kernel.org> Acked-by: NNeil Horman <nhorman@tuxdriver.com> Acked-by: NThomas Gleixner <tglx@linutronix.de> Cc: Richard Weinberger <richard.weinberger@gmail.com> Cc: Tejun Heo <tj@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 Jan Kara 提交于
fsnotify_clear_marks_by_group_flags() can race with fsnotify_destroy_marks() so that when fsnotify_destroy_mark_locked() drops mark_mutex, a mark from the list iterated by fsnotify_clear_marks_by_group_flags() can be freed and thus the next entry pointer we have cached may become stale and we dereference free memory. Fix the problem by first moving marks to free to a special private list and then always free the first entry in the special list. This method is safe even when entries from the list can disappear once we drop the lock. Signed-off-by: NJan Kara <jack@suse.com> Reported-by: NAshish Sangwan <a.sangwan@samsung.com> Reviewed-by: NAshish Sangwan <a.sangwan@samsung.com> Cc: Lino Sanfilippo <LinoSanfilippo@gmx.de> 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 Sowmini Varadhan 提交于
Using a 64 bit constant generates "warning: integer constant is too large for 'long' type" on 32 bit platforms. Instead use ~0ul and BITS_PER_LONG. Detected by Andrew Morton on ARMD. Signed-off-by: NSowmini Varadhan <sowmini.varadhan@oracle.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David S. Miller <davem@davemloft.net> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Konstantin Khlebnikov 提交于
This patch fixes creation of new kmem-caches after enabling sanity_checks for existing mergeable kmem-caches in runtime: before that patch creation fails because unique name in sysfs already taken by existing kmem-cache. Unlike other debug options this doesn't change object layout and could be enabled and disabled at any time. Signed-off-by: NKonstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: NChristoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Acked-by: NDavid Rientjes <rientjes@google.com> 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 Amanieu d'Antras 提交于
This function may copy the si_addr_lsb field to user mode when it hasn't been initialized, which can leak kernel stack data to user mode. Just checking the value of si_code is insufficient because the same si_code value is shared between multiple signals. This is solved by checking the value of si_signo in addition to si_code. Signed-off-by: NAmanieu d'Antras <amanieu@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Ingo Molnar <mingo@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 Amanieu d'Antras 提交于
This function may copy the si_addr_lsb, si_lower and si_upper fields to user mode when they haven't been initialized, which can leak kernel stack data to user mode. Just checking the value of si_code is insufficient because the same si_code value is shared between multiple signals. This is solved by checking the value of si_signo in addition to si_code. Signed-off-by: NAmanieu d'Antras <amanieu@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Amanieu d'Antras 提交于
This function can leak kernel stack data when the user siginfo_t has a positive si_code value. The top 16 bits of si_code descibe which fields in the siginfo_t union are active, but they are treated inconsistently between copy_siginfo_from_user32, copy_siginfo_to_user32 and copy_siginfo_to_user. copy_siginfo_from_user32 is called from rt_sigqueueinfo and rt_tgsigqueueinfo in which the user has full control overthe top 16 bits of si_code. This fixes the following information leaks: x86: 8 bytes leaked when sending a signal from a 32-bit process to itself. This leak grows to 16 bytes if the process uses x32. (si_code = __SI_CHLD) x86: 100 bytes leaked when sending a signal from a 32-bit process to a 64-bit process. (si_code = -1) sparc: 4 bytes leaked when sending a signal from a 32-bit process to a 64-bit process. (si_code = any) parsic and s390 have similar bugs, but they are not vulnerable because rt_[tg]sigqueueinfo have checks that prevent sending a positive si_code to a different process. These bugs are also fixed for consistency. Signed-off-by: NAmanieu d'Antras <amanieu@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joseph Qi 提交于
The "BUG_ON(list_empty(&osb->blocked_lock_list))" in ocfs2_downconvert_thread_do_work can be triggered in the following case: ocfs2dc has firstly saved osb->blocked_lock_count to local varibale processed, and then processes the dentry lockres. During the dentry put, it calls iput and then deletes rw, inode and open lockres from blocked list in ocfs2_mark_lockres_freeing. And this causes the variable `processed' to not reflect the number of blocked lockres to be processed, which triggers the BUG. Signed-off-by: NJoseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.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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由 Mel Gorman 提交于
Dave Hansen reported the following; My laptop has been behaving strangely with 4.2-rc2. Once I log in to my X session, I start getting all kinds of strange errors from applications and see this in my dmesg: VFS: file-max limit 8192 reached The problem is that the file-max is calculated before memory is fully initialised and miscalculates how much memory the kernel is using. This patch recalculates file-max after deferred memory initialisation. Note that using memory hotplug infrastructure would not have avoided this problem as the value is not recalculated after memory hot-add. 4.1: files_stat.max_files = 6582781 4.2-rc2: files_stat.max_files = 8192 4.2-rc2 patched: files_stat.max_files = 6562467 Small differences with the patch applied and 4.1 but not enough to matter. Signed-off-by: NMel Gorman <mgorman@suse.de> Reported-by: NDave Hansen <dave.hansen@intel.com> Cc: Nicolai Stange <nicstange@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Alex Ng <alexng@microsoft.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Nicolai Stange 提交于
Commit 0e1cc95b ("mm: meminit: finish initialisation of struct pages before basic setup") introduced a rwsem to signal completion of the initialization workers. Lockdep complains about possible recursive locking: ============================================= [ INFO: possible recursive locking detected ] 4.1.0-12802-g1dc51b82 #3 Not tainted --------------------------------------------- swapper/0/1 is trying to acquire lock: (pgdat_init_rwsem){++++.+}, at: [<ffffffff8424c7fb>] page_alloc_init_late+0xc7/0xe6 but task is already holding lock: (pgdat_init_rwsem){++++.+}, at: [<ffffffff8424c772>] page_alloc_init_late+0x3e/0xe6 Replace the rwsem by a completion together with an atomic "outstanding work counter". [peterz@infradead.org: Barrier removal on the grounds of being pointless] [mgorman@suse.de: Applied review feedback] Signed-off-by: NNicolai Stange <nicstange@gmail.com> Signed-off-by: NMel Gorman <mgorman@suse.de> Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Alex Ng <alexng@microsoft.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Mel Gorman 提交于
early_pfn_to_nid() historically was inherently not SMP safe but only used during boot which is inherently single threaded or during hotplug which is protected by a giant mutex. With deferred memory initialisation there was a thread-safe version introduced and the early_pfn_to_nid would trigger a BUG_ON if used unsafely. Memory hotplug hit that check. This patch makes early_pfn_to_nid introduces a lock to make it safe to use during hotplug. Signed-off-by: NMel Gorman <mgorman@suse.de> Reported-by: NAlex Ng <alexng@microsoft.com> Tested-by: NAlex Ng <alexng@microsoft.com> Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: Nicolai Stange <nicstange@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Marcus Gelderie 提交于
A while back, the message queue implementation in the kernel was improved to use btrees to speed up retrieval of messages, in commit d6629859 ("ipc/mqueue: improve performance of send/recv"). That patch introducing the improved kernel handling of message queues (using btrees) has, as a by-product, changed the meaning of the QSIZE field in the pseudo-file created for the queue. Before, this field reflected the size of the user-data in the queue. Since, it also takes kernel data structures into account. For example, if 13 bytes of user data are in the queue, on my machine the file reports a size of 61 bytes. There was some discussion on this topic before (for example https://lkml.org/lkml/2014/10/1/115). Commenting on a th lkml, Michael Kerrisk gave the following background (https://lkml.org/lkml/2015/6/16/74): The pseudofiles in the mqueue filesystem (usually mounted at /dev/mqueue) expose fields with metadata describing a message queue. One of these fields, QSIZE, as originally implemented, showed the total number of bytes of user data in all messages in the message queue, and this feature was documented from the beginning in the mq_overview(7) page. In 3.5, some other (useful) work happened to break the user-space API in a couple of places, including the value exposed via QSIZE, which now includes a measure of kernel overhead bytes for the queue, a figure that renders QSIZE useless for its original purpose, since there's no way to deduce the number of overhead bytes consumed by the implementation. (The other user-space breakage was subsequently fixed.) This patch removes the accounting of kernel data structures in the queue. Reporting the size of these data-structures in the QSIZE field was a breaking change (see Michael's comment above). Without the QSIZE field reporting the total size of user-data in the queue, there is no way to deduce this number. It should be noted that the resource limit RLIMIT_MSGQUEUE is counted against the worst-case size of the queue (in both the old and the new implementation). Therefore, the kernel overhead accounting in QSIZE is not necessary to help the user understand the limitations RLIMIT imposes on the processes. Signed-off-by: NMarcus Gelderie <redmnic@gmail.com> Acked-by: NDoug Ledford <dledford@redhat.com> Acked-by: NMichael Kerrisk <mtk.manpages@gmail.com> Acked-by: NDavidlohr Bueso <dbueso@suse.de> Cc: David Howells <dhowells@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: John Duffy <jb_duffy@btinternet.com> Cc: Arto Bendiken <arto@bendiken.net> Cc: Manfred Spraul <manfred@colorfullife.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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- 06 8月, 2015 6 次提交
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由 David Weinehall 提交于
VBT version 196 increased the size of common_child_dev_config. The parser code assumed that the size of this structure would not change. The modified code now copies the amount needed based on the VBT version, and emits a debug message if the VBT version is unknown (too new); since the struct config block won't shrink in newer versions it should be harmless to copy the maximum known size in such cases, so that's what we do, but emitting the warning is probably sensible anyway. In the longer run it might make sense to modify the parser code to use a version/feature mapping, rather than hardcoding things like this, but for now the variants are fairly managable. This fixes a regression introduced in commit 90e4f159 Author: Ville Syrjälä <ville.syrjala@linux.intel.com> Date: Wed Mar 25 18:45:58 2015 +0200 drm/i915: Fix the VBT child device parsing for BSW since we're hitting a DRM_ERROR on older platforms with this. v2: Stricter size checks Signed-off-by: NDavid Weinehall <david.weinehall@linux.intel.com> [danvet: Fixup format string.] Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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由 Jammy Zhou 提交于
The fw_version and feature_verion should be set correctly when the firmwares are loaded by SMU on Tonga/Carrzio/Iceland Signed-off-by: NJammy Zhou <Jammy.Zhou@amd.com> Reviewed-by: NChristian König <christian.koenig@amd.com>
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由 Jammy Zhou 提交于
Signed-off-by: NJammy Zhou <Jammy.Zhou@amd.com> Reviewed-by: NChristian König <christian.koenig@amd.com>
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由 Jammy Zhou 提交于
Expose feature version to user space for RLC/MEC/MEC2 ucode as well v2: fix coding style Signed-off-by: NJammy Zhou <Jammy.Zhou@amd.com> Reviewed-by: NChristian König <christian.koenig@amd.com>
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由 Nicolas Iooss 提交于
gfx_v7_0_print_status contains a for loop on variable queue which does not update this variable between each iteration. This is bug is reported by clang while building allmodconfig LLVMLinux on x86_64: drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c:5126:19: error: variable 'queue' used in loop condition not modified in loop body [-Werror,-Wloop-analysis] for (queue = 0; queue < 8; i++) { ^~~~~ Fix this by incrementing variable queue instead of i in this loop. Signed-off-by: NNicolas Iooss <nicolas.iooss_linux@m4x.org> Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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由 Alex Deucher 提交于
Always set num_rbs to 2 for CZ. The 1 RB parts are often harvest configs. The will get sorted out in mesa when we program PA_SC_RASTER_CONFIG[_1]. Acked-by: NChristian König <christian.koenig@amd.com> Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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- 05 8月, 2015 4 次提交
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git://git.kernel.org/pub/scm/virt/kvm/kvm由 Linus Torvalds 提交于
Pull KVM fixes from Paolo Bonzini: "Just two very small & simple patches" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: MTRR: Use default type for non-MTRR-covered gfn before WARN_ON KVM: s390: Fix hang VCPU hang/loop regression
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由 Alex Williamson 提交于
The patch was munged on commit to re-order these tests resulting in excessive warnings when trying to do device assignment. Return to original ordering: https://lkml.org/lkml/2015/7/15/769 Fixes: 3e5d2fdc ("KVM: MTRR: simplify kvm_mtrr_get_guest_memory_type") Signed-off-by: NAlex Williamson <alex.williamson@redhat.com> Reviewed-by: NXiao Guangrong <guangrong.xiao@linux.intel.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Jean-Francois Moine 提交于
The commit 8c7a075d "drm/i2c: tda998x: use drm_hdmi_avi_infoframe_from_display_mode()" also uses hdmi_avi_infoframe_pack() to create the AVI infoframe. This function sets the checksum of the frame and this breaks the second calculation of the checksum done in tda998x_write_if(). Fixes: 8c7a075d ("drm/i2c: tda998x: use drm_hdmi_avi_infoframe_from_display_mode()") Signed-off-by: NJean-Francois Moine <moinejf@free.fr> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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git://neil.brown.name/md由 Linus Torvalds 提交于
Pull md fixes from Neil Brown: "Three more fixes for md in 4.2 Mostly corner-case stuff. One of these patches is for a CVE: CVE-2015-5697 I'm not convinced it is serious (data leak from CAP_SYS_ADMIN ioctl) but as people seem to want to back-port it, I've included a minimal version here. The remainder of that patch from Benjamin is code-cleanup and will arrive in the 4.3 merge window" * tag 'md/4.2-rc5-fixes' of git://neil.brown.name/md: md/raid5: don't let shrink_slab shrink too far. md: use kzalloc() when bitmap is disabled md/raid1: extend spinlock to protect raid1_end_read_request against inconsistencies
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