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author | Adam Litke <agl@us.ibm.com> | 2005-10-29 18:16:47 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-29 21:40:43 -0700 |
commit | 2e9b367c2273ed21c9852a04d90944d472c4f3e6 (patch) | |
tree | 75e802f07a8c4f0554547e8dd795f544c7e9d7e8 /mm | |
parent | 4c887265977213985091476be40ab11dfdcb4caf (diff) | |
download | op-kernel-dev-2e9b367c2273ed21c9852a04d90944d472c4f3e6.zip op-kernel-dev-2e9b367c2273ed21c9852a04d90944d472c4f3e6.tar.gz |
[PATCH] hugetlb: overcommit accounting check
Basic overcommit checking for hugetlb_file_map() based on an implementation
used with demand faulting in SLES9.
Since demand faulting can't guarantee the availability of pages at mmap
time, this patch implements a basic sanity check to ensure that the number
of huge pages required to satisfy the mmap are currently available.
Despite the obvious race, I think it is a good start on doing proper
accounting. I'd like to work towards an accounting system that mimics the
semantics of normal pages (especially for the MAP_PRIVATE/COW case). That
work is underway and builds on what this patch starts.
Huge page shared memory segments are simpler and still maintain their
commit on shmget semantics.
Signed-off-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions