diff options
| -rw-r--r-- | fs/ubifs/super.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 13097830e8b..471301799c5 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -35,6 +35,7 @@ #include <linux/seq_file.h> #include <linux/mount.h> #include <linux/math64.h> +#include <linux/writeback.h> #include "ubifs.h" /* @@ -431,6 +432,23 @@ static int ubifs_sync_fs(struct super_block *sb, int wait) struct ubifs_info *c = sb->s_fs_info; int i, ret = 0, err; long long bud_bytes; + struct writeback_control wbc = { + .sync_mode = wait ? WB_SYNC_ALL : WB_SYNC_HOLD, + .range_start = 0, + .range_end = LLONG_MAX, + .nr_to_write = LONG_MAX, + }; + + /* + * VFS calls '->sync_fs()' before synchronizing all dirty inodes and + * pages, so synchronize them first, then commit the journal. Strictly + * speaking, it is not necessary to commit the journal here, + * synchronizing write-buffers would be enough. But committing makes + * UBIFS free space predictions much more accurate, so we want to let + * the user be able to get more accurate results of 'statfs()' after + * they synchronize the file system. + */ + generic_sync_sb_inodes(sb, &wbc); if (c->jheads) { for (i = 0; i < c->jhead_cnt; i++) { |