We should guarantee serving free sections for syncing metadata during fsync. Previously, there is no space check before triggering checkpoint and sync_node_pages. Therefore, if a bunch of fsync calls are triggered under 100% of FS utilization, f2fs is able to be faced with no free sections, resulting in BUG_ON(). Signed-off-by: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx> --- fs/f2fs/file.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 88593c5..7354c2d 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -137,6 +137,9 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) if (ret) return ret; + /* guarantee free sections for fsync */ + f2fs_balance_fs(sbi); + mutex_lock(&inode->i_mutex); if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) -- 1.8.0.1.250.gb7973fb -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
