From: Subject: patch jbd2-don-t-give-up-looking-for-space-so-easily-in-__jbd2_log_wait_for_space.patch added to 2.6.27-stable tree Date: Wed, 03 Dec 2008 10:56:05 -0800 Message-ID: <20081203185933.BCB1249050@coco.kroah.org> References: <1226851540-8032-16-git-send-email-tytso@mit.edu> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: , To: tytso@mit.edu, duaneg@dghda.com, gregkh@suse.de, linux-ext4@vger.kernel.org, toshi.okajima@jp.fujitsu.com Return-path: Received: from kroah.org ([198.145.64.141]:60970 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752376AbYLCS7f (ORCPT ); Wed, 3 Dec 2008 13:59:35 -0500 In-Reply-To: <1226851540-8032-16-git-send-email-tytso@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: This is a note to let you know that we have just queued up the patch ti= tled Subject: jbd2: don't give up looking for space so easily in __jbd2_= log_wait_for_space to the 2.6.27-stable tree. Its filename is jbd2-don-t-give-up-looking-for-space-so-easily-in-__jbd2_log_wait_f= or_space.patch A git repo of this tree can be found at=20 http://www.kernel.org/git/?p=3Dlinux/kernel/git/stable/stable-queue= =2Egit;a=3Dsummary =46rom tytso@mit.edu Wed Dec 3 10:43:25 2008 =46rom: "Theodore Ts'o" Date: Sun, 16 Nov 2008 11:05:35 -0500 Subject: jbd2: don't give up looking for space so easily in __jbd2_log_= wait_for_space To: stable@kernel.org Cc: Toshiyuki Okajima , Ext4 Developers L= ist , "Theodore Ts'o" , Duan= e Griffin Message-ID: <1226851540-8032-16-git-send-email-tytso@mit.edu> =46rom: "Theodore Ts'o" (cherry picked from commit 8c3f25d8950c3e9fe6c9849f88679b3f2a071550) Commit 23f8b79e introducd a regression because it assumed that if there were no transactions ready to be checkpointed, that no progress could be made on making space available in the journal, and so the journal should be aborted. This assumption is false; it could be the case that simply calling jbd2_cleanup_journal_tail() will recover the necessary space, or, for small journals, the currently committing transaction could be responsible for chewing up the required space in the log, so we need to wait for the currently committing transaction to finish before trying to force a checkpoint operation. This patch fixes a bug reported by Mihai Harpau at: https://bugzilla.redhat.com/show_bug.cgi?id=3D469582 This patch fixes a bug reported by Fran=C3=A7ois Valenduc at: http://bugzilla.kernel.org/show_bug.cgi?id=3D11840 Signed-off-by: "Theodore Ts'o" Cc: Duane Griffin Cc: Toshiyuki Okajima Signed-off-by: Greg Kroah-Hartman --- fs/jbd2/checkpoint.c | 32 +++++++++++++++++++++++++------- 1 file changed, 25 insertions(+), 7 deletions(-) --- a/fs/jbd2/checkpoint.c +++ b/fs/jbd2/checkpoint.c @@ -114,7 +114,7 @@ static int __try_to_free_cp_buf(struct j */ void __jbd2_log_wait_for_space(journal_t *journal) { - int nblocks; + int nblocks, space_left; assert_spin_locked(&journal->j_state_lock); =20 nblocks =3D jbd_space_needed(journal); @@ -127,25 +127,43 @@ void __jbd2_log_wait_for_space(journal_t /* * Test again, another process may have checkpointed while we * were waiting for the checkpoint lock. If there are no - * outstanding transactions there is nothing to checkpoint and - * we can't make progress. Abort the journal in this case. + * transactions ready to be checkpointed, try to recover + * journal space by calling cleanup_journal_tail(), and if + * that doesn't work, by waiting for the currently committing + * transaction to complete. If there is absolutely no way + * to make progress, this is either a BUG or corrupted + * filesystem, so abort the journal and leave a stack + * trace for forensic evidence. */ spin_lock(&journal->j_state_lock); spin_lock(&journal->j_list_lock); nblocks =3D jbd_space_needed(journal); - if (__jbd2_log_space_left(journal) < nblocks) { + space_left =3D __jbd2_log_space_left(journal); + if (space_left < nblocks) { int chkpt =3D journal->j_checkpoint_transactions !=3D NULL; + tid_t tid =3D 0; =20 + if (journal->j_committing_transaction) + tid =3D journal->j_committing_transaction->t_tid; spin_unlock(&journal->j_list_lock); spin_unlock(&journal->j_state_lock); if (chkpt) { jbd2_log_do_checkpoint(journal); + } else if (jbd2_cleanup_journal_tail(journal) =3D=3D 0) { + /* We were able to recover space; yay! */ + ; + } else if (tid) { + jbd2_log_wait_commit(journal, tid); } else { - printk(KERN_ERR "%s: no transactions\n", - __func__); + printk(KERN_ERR "%s: needed %d blocks and " + "only had %d space available\n", + __func__, nblocks, space_left); + printk(KERN_ERR "%s: no way to get more " + "journal space in %s\n", __func__, + journal->j_devname); + WARN_ON(1); jbd2_journal_abort(journal, 0); } - spin_lock(&journal->j_state_lock); } else { spin_unlock(&journal->j_list_lock); Patches currently in stable-queue which might be from tytso@mit.edu are queue-2.6.27/ext4-update-flex_bg-free-blocks-and-free-inodes-counters-w= hen-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-name= s.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.pa= tch 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.patc= h queue-2.6.27/ext4-fix-duplicate-entries-returned-from-getdents-system-c= all.patch queue-2.6.27/jbd2-don-t-give-up-looking-for-space-so-easily-in-__jbd2_l= og_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-pre= pare_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-c= all.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" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html