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linux/arch/x86/mm
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Andrea Arcangeli a79e53d856 x86/mm: Fix pgd_lock deadlock 
It's forbidden to take the page_table_lock with the irq disabled
or if there's contention the IPIs (for tlb flushes) sent with
the page_table_lock held will never run leading to a deadlock.

Nobody takes the pgd_lock from irq context so the _irqsave can be
removed.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@kernel.org>
LKML-Reference: <201102162345.p1GNjMjm021738@imap1.linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-10 09:41:57 +01:00
..
kmemcheck x86: Eliminate bp argument from the stack tracing routines 2010-11-18 14:37:34 +01:00
amdtopology_64.c Merge branch 'x86/apic-cleanups' into x86/numa 2010-12-29 11:36:26 -08:00
dump_pagetables.c x86, mm: Create symbolic index into address_markers array 2010-07-20 16:56:19 -07:00
extable.c x86, 64-bit: Move K8 B step iret fixup to fault entry asm 2009-10-12 18:29:46 +02:00
fault.c x86/mm: Fix pgd_lock deadlock 2011-03-10 09:41:57 +01:00
gup.c thp: mmu_notifier_test_young 2011-01-13 17:32:46 -08:00
highmem_32.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
hugetlbpage.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
init_32.c Merge branch 'x86-olpc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-01-13 10:15:12 -08:00
init_64.c x86/mm: Fix pgd_lock deadlock 2011-03-10 09:41:57 +01:00
init.c x86: Add NX protection for kernel data 2010-11-18 12:52:04 +01:00
iomap_32.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
ioremap.c xen: Cope with unmapped pages when initializing kernel pagetable 2010-10-13 16:07:13 -07:00
kmmio.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
Makefile x86, amd-nb: Complete the rename of AMD NB and related code 2010-11-18 15:53:04 +01:00
memblock.c x86, memblock: Remove __memblock_x86_find_in_range_size() 2010-10-05 21:45:43 -07:00
memtest.c x86, memblock: Replace e820_/_early string with memblock_ 2010-08-27 11:13:47 -07:00
mmap.c x86: Use helpers for rlimits 2010-01-27 15:17:31 -08:00
mmio-mod.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
numa_32.c x86-32, memblock: Make add_highpages honor early reserved ranges 2010-10-05 21:44:35 -07:00
numa_64.c x86, numa: Fix numa_emulation code with memory-less node0 2011-03-04 15:20:19 +01:00
numa.c x86: Unify "numa=" command line option handling 2011-01-19 10:25:18 +01:00
pageattr-test.c
pageattr.c x86/mm: Fix pgd_lock deadlock 2011-03-10 09:41:57 +01:00
pat_internal.h x86, pat: Fix memory leak in free_memtype 2010-05-26 11:26:04 -07:00
pat_rbtree.c rbtree: Undo augmented trees performance damage and regression 2010-07-05 14:43:50 +02:00
pat.c Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-08-06 10:17:52 -07:00
pf_in.c x86,mmiotrace: Add support for tracing STOS instruction 2010-08-02 01:32:01 +02:00
pf_in.h
pgtable_32.c x86: remove last traces of quicklist usage 2010-05-24 13:33:31 -07:00
pgtable.c x86/mm: Fix pgd_lock deadlock 2011-03-10 09:41:57 +01:00
physaddr.c x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
physaddr.h x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
setup_nx.c x86, cpu: Only CPU features determine NX capabilities 2010-11-10 15:43:15 -08:00
srat_32.c x86: Unify "numa=" command line option handling 2011-01-19 10:25:18 +01:00
srat_64.c Merge branch 'x86/numa' into x86/urgent 2011-01-10 09:36:07 +01:00
testmmiotrace.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
tlb.c x86: Use online node real index in calulate_tbl_offset() 2010-11-18 10:10:50 +01:00