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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-11-25 10:59:45 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-11-25 12:08:30 -0800 |
| commit | 5f72739583a29bfaa57448ec2c9b122995d0ae4f (patch) | |
| tree | 0c329857102424b596a22ac0a3335257bb226b2a /usr | |
| parent | ce3e6d25f3fbaf48a3e1914d5ac0ddfdc1b38349 (diff) | |
f2fs: fix deadlock during inline_data conversion
A deadlock can be occurred:
Thread 1] Thread 2]
- f2fs_write_data_pages - f2fs_write_begin
- lock_page(page #0)
- grab_cache_page(page #X)
- get_node_page(inode_page)
- grab_cache_page(page #0)
: to convert inline_data
- f2fs_write_data_page
- f2fs_write_inline_data
- get_node_page(inode_page)
In this case, trying to lock inode_page and page #0 causes deadlock.
In order to avoid this, this patch adds a rule for this locking policy,
which is that page #0 should be locked followed by inode_page lock.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions