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27 March 2024, 02:37:15 UTC
Revision 3359b54c8c07338f3a863d1109b42eebccdcf379 authored by Seth, Rohit on 18 October 2005, 21:15:12 UTC, committed by Linus Torvalds on 19 October 2005, 20:56:27 UTC 
[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>
1 parent bb7e257
History
Tip revision: 3359b54c8c07338f3a863d1109b42eebccdcf379 authored by Seth, Rohit on 18 October 2005, 21:15:12 UTC
[PATCH] Handle spurious page fault for hugetlb region
Tip revision: 3359b54
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