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| author |  Chao Yu <yuchao0@huawei.com>
| 2017-06-29 23:17:45 +0800 |
|---|---|---|
| committer |  Jaegeuk Kim <jaegeuk@kernel.org>
| 2017-07-07 10:34:42 -0700 |
| commit | cce1325247b9faafc520c5789fe60feef1fd7092 (patch) | |
| tree | b4b722ce5c23bb52fb36b9f9a291dc1314ea64e7 /fs/f2fs | |
| parent | f2fs: introduce reserved_blocks in sysfs (diff) | |
| download | linux-cce1325247b9faafc520c5789fe60feef1fd7092.tar.gz linux-cce1325247b9faafc520c5789fe60feef1fd7092.tar.bz2 linux-cce1325247b9faafc520c5789fe60feef1fd7092.zip | |
f2fs: stop gc/discard thread in prior during umount
This patch resolves kernel panic for xfstests/081, caused by recent f2fs_bug_on
f2fs: add f2fs_bug_on in __remove_discard_cmd
For fixing, we will stop gc/discard thread in prior in ->kill_sb in order to
avoid referring and releasing race among them.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/segment.c | 19 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 7 |
3 files changed, 18 insertions, 9 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index e15d55ccc4bc..abf9eea67966 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2293,6 +2293,7 @@ void destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free); void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr); bool is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr); void refresh_sit_entry(struct f2fs_sb_info *sbi, block_t old, block_t new); +void stop_discard_thread(struct f2fs_sb_info *sbi); void f2fs_wait_discard_bios(struct f2fs_sb_info *sbi); void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc); void release_discard_addrs(struct f2fs_sb_info *sbi); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 7637033ef87b..6eaa98ea8ec6 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1065,6 +1065,18 @@ void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr) __wait_one_discard_bio(sbi, dc); } +void stop_discard_thread(struct f2fs_sb_info *sbi) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + + if (dcc && dcc->f2fs_issue_discard) { + struct task_struct *discard_thread = dcc->f2fs_issue_discard; + + dcc->f2fs_issue_discard = NULL; + kthread_stop(discard_thread); + } +} + /* This comes from f2fs_put_super */ void f2fs_wait_discard_bios(struct f2fs_sb_info *sbi) { @@ -1422,12 +1434,7 @@ static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi) if (!dcc) return; - if (dcc->f2fs_issue_discard) { - struct task_struct *discard_thread = dcc->f2fs_issue_discard; - - dcc->f2fs_issue_discard = NULL; - kthread_stop(discard_thread); - } + stop_discard_thread(sbi); kfree(dcc); SM_I(sbi)->dcc_info = NULL; diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index c45bac6f1795..f27c141cd8aa 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -566,8 +566,6 @@ static void f2fs_put_super(struct super_block *sb) struct f2fs_sb_info *sbi = F2FS_SB(sb); int i; - stop_gc_thread(sbi); - /* prevent remaining shrinker jobs */ mutex_lock(&sbi->umount_mutex); @@ -1976,8 +1974,11 @@ static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, static void kill_f2fs_super(struct super_block *sb) { - if (sb->s_root) + if (sb->s_root) { set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); + stop_gc_thread(F2FS_SB(sb)); + stop_discard_thread(F2FS_SB(sb)); + } kill_block_super(sb); } |