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authorTheodore Ts'o <tytso@mit.edu>2008-10-06 21:35:40 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-10-06 21:35:40 -0400
commit914258bf2cb22bf4336a1b1d90c551b4b11ca5aa (patch)
tree66a3068b53059154b4584166c4b2ce90ae833b42 /fs/jbd2
parent730c213c79a638137b47a90624e4bac252f07ae7 (diff)
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 'fs/jbd2')
-rw-r--r--fs/jbd2/journal.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 81186a29742..01c3901c3a0 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: