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| author |   Ingo Molnar <mingo@elte.hu> | 2009-03-13 01:33:21 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-13 01:33:21 +0100 |
| commit | 480c93df5b99699390f93a7024c9f60d09da0e96 (patch) | |
| tree | b93b6c8c71c5f2e716dd05b126e01ef4e20ff0af /arch/x86/mm | |
| parent | Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace (diff) | |
| parent | locking: rename trace_softirq_[enter|exit] => lockdep_softirq_[enter|exit] (diff) | |
| download | linux-dev-480c93df5b99699390f93a7024c9f60d09da0e96.tar.xz linux-dev-480c93df5b99699390f93a7024c9f60d09da0e96.zip | |
Merge branch 'core/locking' into tracing/ftrace
Diffstat (limited to 'arch/x86/mm')
| -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 8253bc97587e..9c4294986af7 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -522,6 +522,17 @@ 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: |