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| author | Chao Yu <chao2.yu@samsung.com> | 2013-12-05 02:54:56 +0100 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-12-23 02:18:06 +0100 |
| commit | b9987a277f1ec9dba203d04c3a20d967c01a1fba (patch) | |
| tree | abb337cbc3d88aaa49836c191aa4f33e2226de43 /fs/f2fs/segment.h | |
| parent | f2fs: use inner macro GFP_F2FS_ZERO for simplification (diff) | |
| download | linux-b9987a277f1ec9dba203d04c3a20d967c01a1fba.tar.xz linux-b9987a277f1ec9dba203d04c3a20d967c01a1fba.zip | |
f2fs: avoid unneeded page release for correct _count of page
In find_fsync_dnodes() and recover_data(), our flow is like this:
->f2fs_submit_page_bio()
-> f2fs_put_page()
-> page_cache_release() ---- page->_count declined to zero.
->__free_pages()
-> put_page_testzero() ---- page->_count will be declined again.
We will get a segment fault in put_page_testzero when CONFIG_DEBUG_VM
is on, or return MM with a bad page with wrong _count num.
So let's just release this page.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/segment.h')
0 files changed, 0 insertions, 0 deletions