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| author | Jeff Moyer <jmoyer@redhat.com> | 2018-04-06 01:25:01 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-06 06:36:27 +0200 |
| commit | 3172485f4f8032649c144e4aafa550e1e6179332 (patch) | |
| tree | 2efd535f6a05f132f897b54cfcade87481e16136 | |
| parent | mm: kernel-doc: add missing parameter descriptions (diff) | |
| download | linux-3172485f4f8032649c144e4aafa550e1e6179332.tar.xz linux-3172485f4f8032649c144e4aafa550e1e6179332.zip | |
block_invalidatepage(): only release page if the full page was invalidated
Prior to commit d47992f86b30 ("mm: change invalidatepage prototype to
accept length"), an offset of 0 meant that the full page was being
invalidated. After that commit, we need to instead check the length.
Jan said:
:
: The only possible issue is that try_to_release_page() was called more
: often than necessary. Otherwise the issue is harmless but still it's good
: to have this fixed.
Link: http://lkml.kernel.org/r/x49fu5rtnzs.fsf@segfault.boston.devel.redhat.com
Fixes: d47992f86b307 ("mm: change invalidatepage prototype to accept length")
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Lukas Czerner <lczerner@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/buffer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 9a73924db22f..ec5dd39071e6 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1511,7 +1511,7 @@ void block_invalidatepage(struct page *page, unsigned int offset, * The get_block cached value has been unconditionally invalidated, * so real IO is not possible anymore. */ - if (offset == 0) + if (length == PAGE_SIZE) try_to_release_page(page, 0); out: return; |