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Merge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm

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* 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (198 commits)
  KVM: VMX: Fix host GDT.LIMIT corruption
  KVM: MMU: using __xchg_spte more smarter
  KVM: MMU: cleanup spte set and accssed/dirty tracking
  KVM: MMU: don't atomicly set spte if it's not present
  KVM: MMU: fix page dirty tracking lost while sync page
  KVM: MMU: fix broken page accessed tracking with ept enabled
  KVM: MMU: add missing reserved bits check in speculative path
  KVM: MMU: fix mmu notifier invalidate handler for huge spte
  KVM: x86 emulator: fix xchg instruction emulation
  KVM: x86: Call mask notifiers from pic
  KVM: x86: never re-execute instruction with enabled tdp
  KVM: Document KVM_GET_SUPPORTED_CPUID2 ioctl
  KVM: x86: emulator: inc/dec can have lock prefix
  KVM: MMU: Eliminate redundant temporaries in FNAME(fetch)
  KVM: MMU: Validate all gptes during fetch, not just those used for new pages
  KVM: MMU: Simplify spte fetch() function
  KVM: MMU: Add gpte_valid() helper
  KVM: MMU: Add validate_direct_spte() helper
  KVM: MMU: Add drop_large_spte() helper
  KVM: MMU: Use __set_spte to link shadow pages
  ...
This commit is contained in:
Linus Torvalds 2010-08-04 10:43:01 -07:00
commit 5e83f6fbdb
63 changed files with 3328 additions and 2103 deletions
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33
mm/memory-failure.c
View file

@ -45,6 +45,7 @@
#include <linux/page-isolation.h>
#include <linux/suspend.h>
#include <linux/slab.h>
#include <linux/swapops.h>
#include "internal.h"
int sysctl_memory_failure_early_kill __read_mostly = 0;
@ -1296,3 +1297,35 @@ done:
/* keep elevated page count for bad page */
return ret;
}
/*
* The caller must hold current->mm->mmap_sem in read mode.
*/
int is_hwpoison_address(unsigned long addr)
{
pgd_t *pgdp;
pud_t pud, *pudp;
pmd_t pmd, *pmdp;
pte_t pte, *ptep;
swp_entry_t entry;
pgdp = pgd_offset(current->mm, addr);
if (!pgd_present(*pgdp))
return 0;
pudp = pud_offset(pgdp, addr);
pud = *pudp;
if (!pud_present(pud) || pud_large(pud))
return 0;
pmdp = pmd_offset(pudp, addr);
pmd = *pmdp;
if (!pmd_present(pmd) || pmd_large(pmd))
return 0;
ptep = pte_offset_map(pmdp, addr);
pte = *ptep;
pte_unmap(ptep);
if (!is_swap_pte(pte))
return 0;
entry = pte_to_swp_entry(pte);
return is_hwpoison_entry(entry);
}
EXPORT_SYMBOL_GPL(is_hwpoison_address);