Anthony Iliopoulos 9844f54623 x86, mm, hugetlb: Add missing TLB page invalidation for hugetlb_cow() ... The invalidation is required in order to maintain proper semantics under CoW conditions. In scenarios where a process clones several threads, a thread operating on a core whose DTLB entry for a particular hugepage has not been invalidated, will be reading from the hugepage that belongs to the forked child process, even after hugetlb_cow(). The thread will not see the updated page as long as the stale DTLB entry remains cached, the thread attempts to write into the page, the child process exits, or the thread gets migrated to a different processor. Signed-off-by: Anthony Iliopoulos <anthony.iliopoulos@huawei.com> Link: http://lkml.kernel.org/r/20140514092948.GA17391@server-36.huawei.corp Suggested-by: Shay Goikhman <shay.goikhman@huawei.com> Acked-by: Dave Hansen <dave.hansen@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org> # v2.6.16+ (!)		2014-05-13 16:34:09 -07:00
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asm	x86, mm, hugetlb: Add missing TLB page invalidation for hugetlb_cow()	2014-05-13 16:34:09 -07:00
uapi/asm	x86: Fix typo in MSR_IA32_MISC_ENABLE_LIMIT_CPUID macro	2014-05-09 08:42:47 -07:00