From: David Daney Subject: Re: EXT4 panic at jbd2_journal_put_journal_head() in 3.9+ Date: Fri, 10 May 2013 13:38:57 -0700 Message-ID: <518D5AE1.7040905@gmail.com> References: <6719519.5821368147110937.JavaMail.weblogic@epml17> <20130510192747.GA11707@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: Theodore Ts'o , EUNBONG SONG , "linux-ext4@vger.kernel.org" , "linux-kernel@vger.kernel.org" Return-path: In-Reply-To: <20130510192747.GA11707@thunk.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On 05/10/2013 12:27 PM, Theodore Ts'o wrote: > Hmm, since you seem to be able to reproduce the problem reliably, any > chance you can try bisecting the problem? I've looked at the commits > that touch fs/jbd2 and nothing is jumping out at me. > > Also, how many CPU's do you have your system, and what kind of storage > device were you using when you were running iozone (5400rpm HDD, > 7200RPM HDD, RAID array, SSD, etc.)? I too have seen this. My system is: 12 CPU Octeon (MIPS64) Root is ext3, mounted via ext4fs on a slow CompactFlash/PIO6 I saw the crash when simply booting a fairly bare-bones Debian distro, although it is somewhat random: . . ata3: PATA max PIO6 cmd 900000001d040000 ctl 900000001d05000d irq 63 . . ata3.00: CFA: CF 4GB, 20101001, max UDMA/133 ata3.00: 7847280 sectors, multi 0: LBA ata3.00: configured for PIO6 . . scsi 2:0:0:0: Direct-Access ATA CF 4GB 2010 PQ: 0 ANSI: 5 sd 2:0:0:0: [sda] 7847280 512-byte logical blocks: (4.01 GB/3.74 GiB) sd 2:0:0:0: [sda] Write Protect is off sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2 sd 2:0:0:0: [sda] Attached SCSI disk EXT4-fs (sda2): mounting ext3 file system using the ext4 subsystem EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) VFS: Mounted root (ext3 filesystem) readonly on device 8:2. . . . I have not been able to get it to fail a second time. So for me bisecting might not work. David Daney > > Thanks, > > - Ted > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > >