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| author |   Seth, Rohit <rohit.seth@intel.com> | 2005-10-18 14:15:12 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-19 13:56:27 -0700 |
| commit | 3359b54c8c07338f3a863d1109b42eebccdcf379 (patch) | |
| tree | f91edd52c71e57ce4b46e3875c9054666ca4e24c /kernel/posix-cpu-timers.c | |
| parent | [PATCH] vesafb: Fix display corruption on display blank (diff) | |
| download | linux-dev-3359b54c8c07338f3a863d1109b42eebccdcf379.tar.xz linux-dev-3359b54c8c07338f3a863d1109b42eebccdcf379.zip | |
[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/posix-cpu-timers.c')
0 files changed, 0 insertions, 0 deletions