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| author | Chao Yu <yuchao0@huawei.com> | 2018-08-05 23:04:25 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-09-18 14:42:39 -0700 |
| commit | 4e76883a94dab869a6ecc77d49b6f39de5ccc9c9 (patch) | |
| tree | 26fe87d10f5b5860da412cf0f72198f776c80579 /tools/perf/scripts/python/netdev-times.py | |
| parent | e356f6e4e509586df5cb1e01b0290b49f22abee6 (diff) | |
f2fs: fix avoid race between truncate and background GC
Thread A Background GC
- f2fs_setattr isize to 0
- truncate_setsize
- gc_data_segment
- f2fs_get_read_data_page page #0
- set_page_dirty
- set_cold_data
- f2fs_truncate
- f2fs_setattr isize to 4k
- read 4k <--- hit data in cached page #0
Above race condition can cause read out invalid data in a truncated
page, fix it by i_gc_rwsem[WRITE] lock.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
0 files changed, 0 insertions, 0 deletions