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author | Seth, Rohit <rohit.seth@intel.com> | 2005-10-18 21:15:12 (GMT) |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-19 20:56:27 (GMT) |
commit | 3359b54c8c07338f3a863d1109b42eebccdcf379 (patch) | |
tree | f91edd52c71e57ce4b46e3875c9054666ca4e24c /mm/hugetlb.c | |
parent | bb7e257ef8d8ba43cab356aa1cc1b20d0106d45f (diff) | |
download | linux-3359b54c8c07338f3a863d1109b42eebccdcf379.tar.xz |
[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 'mm/hugetlb.c')
0 files changed, 0 insertions, 0 deletions