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authorSeth, Rohit <rohit.seth@intel.com>2005-10-18 14:15:12 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-19 13:56:27 -0700
commit3359b54c8c07338f3a863d1109b42eebccdcf379 (patch)
treef91edd52c71e57ce4b46e3875c9054666ca4e24c /kernel
parentbb7e257ef8d8ba43cab356aa1cc1b20d0106d45f (diff)
[PATCH] Handle spurious page fault for hugetlb region
The hugetlb pages are currently pre-faulted. At the time of mmap of hugepages, we populate the new PTEs. It is possible that HW has already cached some of the unused PTEs internally. These stale entries never get a chance to be purged in existing control flow. This patch extends the check in page fault code for hugepages. Check if a faulted address falls with in size for the hugetlb file backing it. We return VM_FAULT_MINOR for these cases (assuming that the arch specific page-faulting code purges the stale entry for the archs that need it). Signed-off-by: Rohit Seth <rohit.seth@intel.com> [ This is apparently arguably an ia64 port bug. But the code won't hurt, and for now it fixes a real problem on some ia64 machines ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
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