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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-11 20:04:51 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-11 20:04:51 +0100 |
| commit | f809e5a21f05b4aaeef0f9b191c01438d392fa5a (patch) | |
| tree | 57e9939d395e4d4e9bc36422a70e9e853141391b | |
| parent | Fix _fat_bmap() locking (diff) | |
| parent | x86: work around Fedora-11 x86-32 kernel failures on Intel Atom CPUs (diff) | |
| download | linux-f809e5a21f05b4aaeef0f9b191c01438d392fa5a.tar.xz linux-f809e5a21f05b4aaeef0f9b191c01438d392fa5a.zip | |
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: work around Fedora-11 x86-32 kernel failures on Intel Atom CPUs
| -rw-r--r-- | arch/x86/mm/pageattr.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 7be47d1a97e4..7233bd7e357b 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -515,6 +515,17 @@ static int split_large_page(pte_t *kpte, unsigned long address) * primary protection behavior: */ __set_pmd_pte(kpte, address, mk_pte(base, __pgprot(_KERNPG_TABLE))); + + /* + * Intel Atom errata AAH41 workaround. + * + * The real fix should be in hw or in a microcode update, but + * we also probabilistically try to reduce the window of having + * a large TLB mixed with 4K TLBs while instruction fetches are + * going on. + */ + __flush_tlb_all(); + base = NULL; out_unlock: |