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| author |   Paul Cassella <cassella@cray.com> | 2014-08-06 16:07:24 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:20 -0700 |
| commit | 9a95f3cf7b33d66fa64727cff8cd2f2a9d09f335 (patch) | |
| tree | 14d7c178144b6de0b352b8e8d4b04ffdbae9a71c /net | |
| parent | mm: page_alloc: reduce cost of the fair zone allocation policy (diff) | |
| download | linux-dev-9a95f3cf7b33d66fa64727cff8cd2f2a9d09f335.tar.xz linux-dev-9a95f3cf7b33d66fa64727cff8cd2f2a9d09f335.zip | |
mm: describe mmap_sem rules for __lock_page_or_retry() and callers
Add a comment describing the circumstances in which
__lock_page_or_retry() will or will not release the mmap_sem when
returning 0.
Add comments to lock_page_or_retry()'s callers (filemap_fault(),
do_swap_page()) noting the impact on VM_FAULT_RETRY returns.
Add comments on up the call tree, particularly replacing the false "We
return with mmap_sem still held" comments.
Signed-off-by: Paul Cassella <cassella@cray.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions