Dave Hansen 1de14c3c5c x86-32: Fix possible incomplete TLB invalidate with PAE pagetables ... This patch attempts to fix: https://bugzilla.kernel.org/show_bug.cgi?id=56461 The symptom is a crash and messages like this: chrome: Corrupted page table at address 34a03000 *pdpt = 0000000000000000 *pde = 0000000000000000 Bad pagetable: 000f [#1] PREEMPT SMP Ingo guesses this got introduced by commit 611ae8e3f5 ("x86/tlb: enable tlb flush range support for x86") since that code started to free unused pagetables. On x86-32 PAE kernels, that new code has the potential to free an entire PMD page and will clear one of the four page-directory-pointer-table (aka pgd_t entries). The hardware aggressively "caches" these top-level entries and invlpg does not actually affect the CPU's copy. If we clear one we *HAVE* to do a full TLB flush, otherwise we might continue using a freed pmd page. (note, we do this properly on the population side in pud_populate()). This patch tracks whenever we clear one of these entries in the 'struct mmu_gather', and ensures that we follow up with a full tlb flush. BTW, I disassembled and checked that: if (tlb->fullmm == 0) and if (!tlb->fullmm && !tlb->need_flush_all) generate essentially the same code, so there should be zero impact there to the !PAE case. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Artem S Tashkinov <t.artem@mailcity.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-04-12 16:56:47 -07:00
..
backing-dev.c
balloon_compaction.c
bootmem.c
bounce.c
cleancache.c
compaction.c
debug-pagealloc.c
dmapool.c
fadvise.c
failslab.c
filemap_xip.c
filemap.c
fremap.c	Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"	2013-03-28 17:45:51 -07:00
frontswap.c
highmem.c
huge_memory.c
hugetlb_cgroup.c
hugetlb.c	mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting	2013-03-22 16:41:20 -07:00
hwpoison-inject.c
init-mm.c
internal.h
interval_tree.c
Kconfig	Select VIRT_TO_BUS directly where needed	2013-03-12 11:16:40 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c	ksm: fix m68k build: only NUMA needs pfn_to_nid	2013-03-08 15:05:34 -08:00
maccess.c
madvise.c
Makefile
memblock.c	x86, ACPI, mm: Revert movablemem_map support	2013-03-02 09:34:39 -08:00
memcontrol.c	memcg: initialize kmem-cache destroying work earlier	2013-03-08 15:05:34 -08:00
memory_hotplug.c	mm/hotplug: only free wait_table if it's allocated by vmalloc	2013-03-22 16:41:20 -07:00
memory-failure.c
memory.c	x86-32: Fix possible incomplete TLB invalidate with PAE pagetables	2013-04-12 16:56:47 -07:00
mempolicy.c	mm/mempolicy.c: fix sp_node_init() argument ordering	2013-03-08 15:05:34 -08:00
mempool.c
migrate.c
mincore.c
mlock.c	Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"	2013-03-28 17:45:51 -07:00
mm_init.c
mmap.c	mm: prevent mmap_cache race in find_vma()	2013-04-04 11:46:28 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c
msync.c
nobootmem.c
nommu.c	mm: prevent mmap_cache race in find_vma()	2013-04-04 11:46:28 -07:00
oom_kill.c
page_alloc.c	x86, ACPI, mm: Revert movablemem_map support	2013-03-02 09:34:39 -08:00
page_cgroup.c
page_io.c
page_isolation.c
page-writeback.c
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c
pgtable-generic.c
process_vm_access.c	Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys	2013-03-12 11:05:45 -07:00
quicklist.c
readahead.c
rmap.c
shmem.c
slab_common.c
slab.c
slab.h
slob.c
slub.c
sparse-vmemmap.c
sparse.c
swap_state.c
swap.c
swapfile.c
truncate.c
util.c
vmalloc.c
vmscan.c
vmstat.c