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| author | Theodore Ts'o <tytso@mit.edu> | 2008-10-07 03:35:40 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-10-07 03:35:40 +0200 |
| commit | 914258bf2cb22bf4336a1b1d90c551b4b11ca5aa (patch) | |
| tree | 66a3068b53059154b4584166c4b2ce90ae833b42 /fs/jbd2/journal.c | |
| parent | ext4: use percpu data structures for lg_prealloc_list (diff) | |
| download | linux-914258bf2cb22bf4336a1b1d90c551b4b11ca5aa.tar.xz linux-914258bf2cb22bf4336a1b1d90c551b4b11ca5aa.zip | |
ext4/jbd2: Avoid WARN() messages when failing to write to the superblock
This fixes some very common warnings reported by kerneloops.org
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to '')
| -rw-r--r-- | fs/jbd2/journal.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 81186a29742e..01c3901c3a07 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1255,6 +1255,22 @@ void jbd2_journal_update_superblock(journal_t *journal, int wait) goto out; } + if (buffer_write_io_error(bh)) { + /* + * Oh, dear. A previous attempt to write the journal + * superblock failed. This could happen because the + * USB device was yanked out. Or it could happen to + * be a transient write error and maybe the block will + * be remapped. Nothing we can do but to retry the + * write and hope for the best. + */ + printk(KERN_ERR "JBD2: previous I/O error detected " + "for journal superblock update for %s.\n", + journal->j_devname); + clear_buffer_write_io_error(bh); + set_buffer_uptodate(bh); + } + spin_lock(&journal->j_state_lock); jbd_debug(1,"JBD: updating superblock (start %ld, seq %d, errno %d)\n", journal->j_tail, journal->j_tail_sequence, journal->j_errno); @@ -1266,9 +1282,16 @@ void jbd2_journal_update_superblock(journal_t *journal, int wait) BUFFER_TRACE(bh, "marking dirty"); mark_buffer_dirty(bh); - if (wait) + if (wait) { sync_dirty_buffer(bh); - else + if (buffer_write_io_error(bh)) { + printk(KERN_ERR "JBD2: I/O error detected " + "when updating journal superblock for %s.\n", + journal->j_devname); + clear_buffer_write_io_error(bh); + set_buffer_uptodate(bh); + } + } else ll_rw_block(SWRITE, 1, &bh); out: |