From: Chao Yu <[email protected]> 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 <[email protected]> Signed-off-by: Chao Yu <[email protected]> --- fs/f2fs/f2fs.h | 1 + fs/f2fs/segment.c | 19 +++++++++++++------ 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 c27a6264d9bf..da7edb605180 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2288,6 +2288,7 @@ 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 86a0c1095939..1b22b6b4081c 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1063,6 +1063,18 @@ 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) { @@ -1420,12 +1432,7 @@ 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 3da6fb276f8b..0a0af82e4dd4 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); @@ -1974,8 +1972,11 @@ 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); } -- 2.13.0.90.g1eb437020 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
