- 13 3月, 2009 2 次提交
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由 Frederic Weisbecker 提交于
Extend x86 architecture syscall tracing support with syscall metadata table details. (The upcoming core syscall tracing modifications rely on this.) Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1236955332-10133-3-git-send-email-fweisbec@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Frederic Weisbecker 提交于
Provide the x86 trace callbacks to trace syscalls. Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <1236401580-5758-3-git-send-email-fweisbec@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 12 3月, 2009 1 次提交
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由 Ingo Molnar 提交于
Impact: work around boot crash Work around Intel Atom erratum AAH41 (probabilistically) - it's triggering in the field. Reported-by: NLinus Torvalds <torvalds@linux-foundation.org> Tested-by: NKyle McMartin <kyle@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 10 3月, 2009 2 次提交
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由 Masami Hiramatsu 提交于
Expand irq-off region to cover fixmap using code and cache synchronizing. Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com> LKML-Reference: <49B54688.8090403@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Dave Jones 提交于
This reverts commit e088e4c9. Removing the sysfs interface for p4-clockmod was flagged as a regression in bug 12826. Course of action: - Find out the remaining causes of overheating, and fix them if possible. ACPI should be doing the right thing automatically. If it isn't, we need to fix that. - mark p4-clockmod ui as deprecated - try again with the removal in six months. It's not really feasible to printk about the deprecation, because it needs to happen at all the sysfs entry points, which means adding a lot of strcmp("p4-clockmod".. calls to the core, which.. bleuch. Signed-off-by: NDave Jones <davej@redhat.com>
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- 09 3月, 2009 6 次提交
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由 Rusty Russell 提交于
Impact: remove lots of lguest boot WARN_ON() when CONFIG_SPARSE_IRQ=y We now need to call irq_to_desc_alloc_cpu() before set_irq_chip_and_handler_name(), but we can't do that from init_IRQ (no kmalloc available). So do it as we use interrupts instead. Also means we only alloc for irqs we use, which was the intent of CONFIG_SPARSE_IRQ anyway. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@redhat.com>
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由 Rusty Russell 提交于
Impact: fix lguest boot crash on modern Intel machines The code in early_init_intel does: if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) { u64 misc_enable; rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable); And that rdmsr faults (not allowed from non-0 PL). We can get around this by mugging the family ID part of the cpuid. 5 seems like a good number. Of course, this is a hack (how very lguest!). We could just indicate that we don't support MSRs, or implement lguest_rdmst. Reported-by: NPatrick McHardy <kaber@trash.net> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Tested-by: NPatrick McHardy <kaber@trash.net>
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由 Jeremy Fitzhardinge 提交于
I found that virt_addr_valid() was returning true for fixmap addresses. I'm not sure whether pfn_valid() is supposed to include this test, but there's no harm in being explicit. Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Jiri Slaby <jirislaby@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <49B166D6.2080505@goop.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Stuart Bennett 提交于
Impact: fix race+crash in mmiotrace The list manipulation in remove_kmmio_fault_pages() was broken. If more than one consecutive kmmio_fault_page was re-added during the grace period between unregister_kmmio_probe() and remove_kmmio_fault_pages(), the list manipulation failed to remove pages from the release list. After a second grace period the pages get into rcu_free_kmmio_fault_pages() and raise a BUG_ON() kernel crash. The list manipulation is fixed to properly remove pages from the release list. This bug has been present from the very beginning of mmiotrace in the mainline kernel. It was introduced in 0fd0e3da ("x86: mmiotrace full patch, preview 1"); An urgent fix for Linus. Tested by Stuart (on 32-bit) and Pekka (on amd and intel 64-bit systems, nouveau and nvidia proprietary). Signed-off-by: NStuart Bennett <stuart@freedesktop.org> Signed-off-by: NPekka Paalanen <pq@iki.fi> LKML-Reference: <20090308202135.34933feb@daedalus.pq.iki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Yinghai Lu 提交于
Impact: cleanup Ingo found there warning about nodeid with some configs. try to use for_each_online_node for non numa too. in that case nodeid will be 0. also move out boundary checking from setup_node_bootmem(), so non-numa config will not check it. Signed-off-by: NYinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <49B03069.80001@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Wang Chen 提交于
Impact: improve out-of-range fixmap index debugging Commit "1b42f516" defined the __this_fixmap_does_not_exist() function with a WARN_ON(1) in it. This causes the linker to not report an error when __this_fixmap_does_not_exist() is called with a non-constant parameter. Ingo defined __this_fixmap_does_not_exist() because he wanted to get virt addresses of fix memory of nest level by non-constant index. But we can fix this and still keep the link-time check: We can get the four slot virt addresses on link time and store them to array slot_virt[]. Then we can then refer the slot_virt with non-constant index, in the ioremap-leak detection code. Signed-off-by: NWang Chen <wangchen@cn.fujitsu.com> LKML-Reference: <49B2075B.4070509@cn.fujitsu.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 08 3月, 2009 2 次提交
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由 Yinghai Lu 提交于
Impact: cleanup and code size reduction on 64-bit This code is only applied to Intel Pentium and AMD K7 32-bit cpus. Move those checks to intel_init()/amd_init() for 32-bit so 64-bit will not build this code. Also change to use cpu_index check to see if we need to emit warning. Signed-off-by: NYinghai Lu <yinghai@kernel.org> LKML-Reference: <49B377D2.8030108@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Cliff Wickman 提交于
In uv_flush_tlb_others() (arch/x86/kernel/tlb_uv.c), the "WARN_ON(!in_atomic())" fails if CONFIG_PREEMPT is not enabled. And CONFIG_PREEMPT is not enabled by default in the distribution that most UV owners will use. We could #ifdef CONFIG_PREEMPT the warning, but that is not good form. And there seems to be no suitable fix to in_atomic() when CONFIG_PREMPT is not on. As Ingo commented: > and we have no proper primitive to test for atomicity. (mainly > because we dont know about atomicity on a non-preempt kernel) So we drop the WARN_ON. Signed-off-by: NCliff Wickman <cpw@sgi.com> Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 07 3月, 2009 1 次提交
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由 Cyrill Gorcunov 提交于
Stephen Rothwell reported: |Today's linux-next build (x86_64 allmodconfig) produced this warning: | |In file included from drivers/char/epca.c:49: |drivers/char/digiFep1.h:7:1: warning: "GLOBAL" redefined |In file included from include/linux/linkage.h:5, | from include/linux/kernel.h:11, | from arch/x86/include/asm/system.h:10, | from arch/x86/include/asm/processor.h:17, | from include/linux/prefetch.h:14, | from include/linux/list.h:6, | from include/linux/module.h:9, | from drivers/char/epca.c:29: |arch/x86/include/asm/linkage.h:55:1: warning: this is the location of the previous definition | |Probably introduced by commit 95695547 |("x86: asm linkage - introduce GLOBAL macro") from the x86 tree. Any assembler specific snippets being placed in headers are to be protected by __ASSEMBLY__. Fixed. Also move __ALIGN definition under the same protection as well. Reported-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NCyrill Gorcunov <gorcunov@openvz.org> LKML-Reference: <20090306160833.GB7420@localhost> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 06 3月, 2009 11 次提交
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由 Masami Hiramatsu 提交于
Use fixmaps instead of vmap/vunmap in text_poke() for avoiding page allocation and delayed unmapping. At the result of above change, text_poke() becomes atomic and can be called from stop_machine() etc. Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com> Acked-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca> LKML-Reference: <49B14352.2040705@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Masami Hiramatsu 提交于
Use the mutual exclusion provided by the text edit lock in alternatives code. Since alternative_smp_* will be called from module init code, etc, we'd better protect it from other subsystems. Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com> LKML-Reference: <49B14332.9030109@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Markus Metzger 提交于
ds_write_config() can write the BTS as well as the PEBS part of the DS config. ds_request_pebs() passes the wrong qualifier, which results in the wrong configuration to be written. Reported-by: NStephane Eranian <eranian@googlemail.com> Signed-off-by: NMarkus Metzger <markus.t.metzger@intel.com> LKML-Reference: <20090305085721.A22550@sedona.ch.intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Markus Metzger 提交于
In case a ptraced task is reaped (while the tracer is still attached), ds_exit_thread() is called before ptrace_exit(). The latter will release the bts_tracer and remove the thread's ds_ctx. The former will WARN() if the context is not NULL. Oleg Nesterov submitted patches that move ptrace_exit() before exit_thread() and thus reverse the order of the above calls. Remove the bad warning. I will add it again when Oleg's changes are in. Signed-off-by: NMarkus Metzger <markus.t.metzger@intel.com> LKML-Reference: <20090305084954.A22000@sedona.ch.intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
As a preparational step for unifying noexec handling on 32-bit and 64-bit, rename the do_not_nx variable to disable_nx on 64-bit. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1236265497.31324.11.camel@penberg-laptop> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1236265466.31324.9.camel@penberg-laptop> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Yinghai Lu 提交于
Impact: make boot command line "memtest" do one loop by default So don't need to guess many patterns in one loop. Signed-off-by: NYinghai Lu <yinghai@kernel.org> LKML-Reference: <49B10532.3020105@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tejun Heo 提交于
Impact: fix relocation overflow during module load x86_64 uses 32bit relocations for symbol access and static percpu symbols whether in core or modules must be inside 2GB of the percpu segement base which the dynamic percpu allocator doesn't guarantee. This patch makes x86_64 reserve PERCPU_MODULE_RESERVE bytes in the first chunk so that module percpu areas are always allocated from the first chunk which is always inside the relocatable range. This problem exists for any percpu allocator but is easily triggered when using the embedding allocator because the second chunk is located beyond 2GB on it. This patch also changes the meaning of PERCPU_DYNAMIC_RESERVE such that it only indicates the size of the area to reserve for dynamic allocation as static and dynamic areas can be separate. New PERCPU_DYNAMIC_RESERVED is increased by 4k for both 32 and 64bits as the reserved area separation eats away some allocatable space and having slightly more headroom (currently between 4 and 8k after minimal boot sans module area) makes sense for common case performance. x86_32 can address anywhere from anywhere and doesn't need reserving. Mike Galbraith first reported the problem first and bisected it to the embedding percpu allocator commit. Signed-off-by: NTejun Heo <tj@kernel.org> Reported-by: NMike Galbraith <efault@gmx.de> Reported-by: NJaswinder Singh Rajput <jaswinder@kernel.org>
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由 Tejun Heo 提交于
Impact: add reserved allocation functionality and use it for module percpu variables This patch implements reserved allocation from the first chunk. When setting up the first chunk, arch can ask to set aside certain number of bytes right after the core static area which is available only through a separate reserved allocator. This will be used primarily for module static percpu variables on architectures with limited relocation range to ensure that the module perpcu symbols are inside the relocatable range. If reserved area is requested, the first chunk becomes reserved and isn't available for regular allocation. If the first chunk also includes piggy-back dynamic allocation area, a separate chunk mapping the same region is created to serve dynamic allocation. The first one is called static first chunk and the second dynamic first chunk. Although they share the page map, their different area map initializations guarantee they serve disjoint areas according to their purposes. If arch doesn't setup reserved area, reserved allocation is handled like any other allocation. Signed-off-by: NTejun Heo <tj@kernel.org>
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由 Tejun Heo 提交于
Impact: reduce unnecessary memory usage on certain configurations Embedding percpu allocator allocates unit_size * smp_num_possible_cpus() bytes consecutively and use it for the first chunk. However, if the static area is small, this can result in excessive prellocated free space in the first chunk due to PCPU_MIN_UNIT_SIZE restriction. This patch makes embedding percpu allocator preallocate only what's necessary as described by PERPCU_DYNAMIC_RESERVE and return the leftover to the bootmem allocator. Signed-off-by: NTejun Heo <tj@kernel.org>
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由 Tejun Heo 提交于
Impact: argument semantic cleanup In pcpu_setup_first_chunk(), zero @unit_size and @dyn_size meant auto-sizing. It's okay for @unit_size as 0 doesn't make sense but 0 dynamic reserve size is valid. Alos, if arch @dyn_size is calculated from other parameters, it might end up passing in 0 @dyn_size and malfunction when the size is automatically adjusted. This patch makes both @unit_size and @dyn_size ssize_t and use -1 for auto sizing. Signed-off-by: NTejun Heo <tj@kernel.org>
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- 05 3月, 2009 15 次提交
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由 Ingo Molnar 提交于
Make ack_APIC_irq() build on !SMP && !APIC too. Cc: Dimitri Sivanich <sivanich@sgi.com> LKML-Reference: <20090304185605.GA24419@sgi.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Jeremy Fitzhardinge 提交于
Impact: cleanup, micro-optimization Pre-initialize boot_cpu_data.x86_phys_bits to a reasonable default to remove the use of system_state tests in __virt_addr_valid() and __phys_addr(). Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Jeremy Fitzhardinge 提交于
Rather than relying on the ever-unreliable system_state, add a specific __vmalloc_start_set flag to indicate whether the vmalloc area has meaningful boundaries yet, and use that in x86-32's __phys_addr and __virt_addr_valid. Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Jeremy Fitzhardinge 提交于
gcc 3.2.2 reports: In file included from /usr/src/all/linux-next/arch/x86/include/asm/page.h:8, from /usr/src/all/linux-next/arch/x86/include/asm/processor.h:18, from /usr/src/all/linux-next/arch/x86/include/asm/atomic_32.h:6, from /usr/src/all/linux-next/arch/x86/include/asm/atomic.h:2, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets_32.c:7, from arch/x86/kernel/asm-offsets.c:2: /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:54: warning: parameter has incomplete type /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:56: warning: parameter has incomplete type In file included from /usr/src/all/linux-next/arch/x86/include/asm/page.h:8, from /usr/src/all/linux-next/arch/x86/include/asm/processor.h:18, from include/linux/prefetch.h:14, from include/linux/list.h:6, from include/linux/module.h:9, from init/main.c:13: /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:54: warning: parameter has incomplete type /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:56: warning: parameter has incomplete type This is a bogus warning, but moving the pat-related functions into asm/pat.h and including asm/pgtable_types.h should fix it. Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Reported-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Ingo Molnar 提交于
Impact: build fix Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-14-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-17-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup In preparation for moving the function declaration to a header file, unify 32-bit and 64-bit signatures. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-16-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup The table_start, table_end, and table_top are too generic for global namespace so rename them to be more specific. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-15-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup This patch moves the init_memory_mapping() function to common mm/init.c. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-14-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup This patch adds an empty static inline init_gbpages() for the 32-bit version of init_memory_mapping() making both versions identical. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-13-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup As a trivial preparation for moving common code to arc/x86/mm/init.c, ifdef the 32-bit and 64-bit versions of NR_RANGE_MR. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-12-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup To reduce the diff between the 32-bit and 64-bit versions of init_memory_mapping(), ifdef configuration specific pfn setup code in the function. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-11-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup To reduce the diff between the 32-bit and 64-bit versions of init_memory_mapping(), ifdef configuration specific setup code in the function. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-10-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup This patch adds a sanity check to the 32-bit version of init_memory_mapping() to reduce the diff to the 64-bit version. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-9-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Pekka Enberg 提交于
Impact: cleanup The 64-bit version of init_memory_mapping() uses the last mapped address returned from kernel_physical_mapping_init() whereas the 32-bit version doesn't. This patch adds relevant ifdefs to both versions of the function to reduce the diff between them. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-8-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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