This is a note to let you know that we have just queued up the patch titled Subject: ext4/jbd2: Avoid WARN() messages when failing to write to the superblock to the 2.6.27-stable tree. Its filename is ext4-jbd2-avoid-warn-messages-when-failing-to-write-to-the-superblock.patch A git repo of this tree can be found at http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary >From tytso@xxxxxxx Wed Dec 3 10:02:23 2008 From: "Theodore Ts'o" <tytso@xxxxxxx> Date: Sun, 16 Nov 2008 11:05:27 -0500 Subject: ext4/jbd2: Avoid WARN() messages when failing to write to the superblock To: stable@xxxxxxxxxx Cc: Ext4 Developers List <linux-ext4@xxxxxxxxxxxxxxx>, "Theodore Ts'o" <tytso@xxxxxxx> Message-ID: <1226851540-8032-8-git-send-email-tytso@xxxxxxx> From: "Theodore Ts'o" <tytso@xxxxxxx> (cherry picked from commit 914258bf2cb22bf4336a1b1d90c551b4b11ca5aa) This fixes some very common warnings reported by kerneloops.org Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> --- fs/ext4/super.c | 23 ++++++++++++++++++++++- fs/jbd2/journal.c | 27 +++++++++++++++++++++++++-- 2 files changed, 47 insertions(+), 3 deletions(-) --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2804,13 +2804,34 @@ static void ext4_commit_super(struct sup if (!sbh) return; + if (buffer_write_io_error(sbh)) { + /* + * Oh, dear. A previous attempt to write the + * 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 "ext4: previous I/O error to " + "superblock detected for %s.\n", sb->s_id); + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + } es->s_wtime = cpu_to_le32(get_seconds()); ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); BUFFER_TRACE(sbh, "marking dirty"); mark_buffer_dirty(sbh); - if (sync) + if (sync) { sync_dirty_buffer(sbh); + if (buffer_write_io_error(sbh)) { + printk(KERN_ERR "ext4: I/O error while writing " + "superblock for %s.\n", sb->s_id); + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + } + } } --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1259,6 +1259,22 @@ void jbd2_journal_update_superblock(jour 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); @@ -1270,9 +1286,16 @@ void jbd2_journal_update_superblock(jour 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: Patches currently in stable-queue which might be from tytso@xxxxxxx are queue-2.6.27/ext4-update-flex_bg-free-blocks-and-free-inodes-counters-when-resizing.patch queue-2.6.27/ext4-fix-11321-create-proc-ext4-stats-more-carefully.patch queue-2.6.27/jbd2-fix-proc-setup-for-devices-that-contain-in-their-names.patch queue-2.6.27/ext4-add-missing-unlock-in-ext4_check_descriptors-on-error-path.patch queue-2.6.27/ext4-elevate-write-count-for-migrate-ioctl.patch queue-2.6.27/ext4-renumber-ext4_ioc_migrate.patch queue-2.6.27/ext4-jbd2-avoid-warn-messages-when-failing-to-write-to-the-superblock.patch queue-2.6.27/ext4-fix-initialization-of-uninit-bitmap-blocks.patch queue-2.6.27/jbd2-abort-instead-of-waiting-for-nonexistent-transaction.patch queue-2.6.27/jbd2-fix-buffer-head-leak-when-writing-the-commit-block.patch queue-2.6.27/ext4-fix-xattr-deadlock.patch queue-2.6.27/ext4-free-ext4_prealloc_space-using-kmem_cache_free.patch queue-2.6.27/ext4-do-mballoc-init-before-doing-filesystem-recovery.patch queue-2.6.27/ext4-fix-duplicate-entries-returned-from-getdents-system-call.patch queue-2.6.27/jbd2-don-t-give-up-looking-for-space-so-easily-in-__jbd2_log_wait_for_space.patch queue-2.6.27/ext4-convert-to-host-order-before-using-the-values.patch queue-2.6.27/ext4-wait-on-all-pending-commits-in-ext4_sync_fs.patch queue-2.6.27/ext4-calculate-journal-credits-correctly.patch queue-2.6.27/ext4-mark-the-buffer_heads-as-dirty-and-uptodate-after-prepare_write.patch queue-2.6.27/ext4-add-checksum-calculation-when-clearing-uninit-flag-in-ext4_new_inode.patch queue-2.6.27/ext3-fix-ext3_dx_readdir-hash-collision-handling.patch queue-2.6.27/ext3-fix-duplicate-entries-returned-from-getdents-system-call.patch queue-2.6.27/ext2-fix-ext2-block-reservation-early-enospc-issue.patch queue-2.6.27/ext3-fix-ext3-block-reservation-early-enospc-issue.patch -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html