From: Sachin Sant Subject: Re: EXT4: kernel BUG at fs/jbd2/commit.c:533! Date: Fri, 04 Sep 2009 10:30:06 +0530 Message-ID: <4AA09ED6.3050007@in.ibm.com> References: <4A9E5496.8050909@in.ibm.com> <20090902120958.GA16415@mit.edu> <20090902210737.GV4197@webber.adilger.int> <20090902223011.GA30497@mit.edu> <4A9F3F7F.6030304@in.ibm.com> <4A9F71EA.4070406@in.ibm.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------000104020105070209070500" Cc: Andreas Dilger , linux-ext4@vger.kernel.org, "Aneesh Kumar K.V" To: Theodore Tso Return-path: Received: from e23smtp01.au.ibm.com ([202.81.31.143]:52272 "EHLO e23smtp01.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750890AbZIDFAS (ORCPT ); Fri, 4 Sep 2009 01:00:18 -0400 Received: from d23relay05.au.ibm.com (d23relay05.au.ibm.com [202.81.31.247]) by e23smtp01.au.ibm.com (8.14.3/8.13.1) with ESMTP id n844x4u7021237 for ; Fri, 4 Sep 2009 14:59:04 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay05.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n844wXmd1179864 for ; Fri, 4 Sep 2009 14:58:33 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id n8450HPo029026 for ; Fri, 4 Sep 2009 15:00:17 +1000 In-Reply-To: <4A9F71EA.4070406@in.ibm.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: This is a multi-part message in MIME format. --------------000104020105070209070500 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sachin Sant wrote: > As for this issue not sure how to proceed further. I probably will > continue to execute the tests few more times. Maybe will try on > a different box. After increasing nproc value from 50 to 150 (-p 150) i was able to recreate this bug again. ------------[ cut here ]------------ cpu 0x0: Vector: 700 (Program Check) at [c0000000fedeb970] pc: c000000000280f74: .jbd2_journal_commit_transaction+0x91c/0x1c6c lr: c000000000280f5c: .jbd2_journal_commit_transaction+0x904/0x1c6c sp: c0000000fedebbf0 msr: 8000000000029032 current = 0xc00000005e550c20 paca = 0xc000000000b62600 pid = 13149, comm = kjournald2 kernel BUG at fs/jbd2/commit.c:542! enter ? for help [c0000000fedebdd0] c000000000289cac .kjournald2+0x198/0x46c [c0000000fedebed0] c0000000000a86a0 .kthread+0xac/0xb8 [c0000000fedebf90] c00000000002ab3c .kernel_thread+0x54/0x70 0:mon> dl The change in line number for commit.c (533 to 542) is because of some debug printk's i added in that file. Here are some of the last few statements from dmesg buffer. <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with journalled data mode <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089515). There's a risk of filesystem corruption in case of system crash. <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089516). There's a risk of filesystem corruption in case of system crash. <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089517). There's a risk of filesystem corruption in case of system crash. <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089518). There's a risk of filesystem corruption in case of system crash. <1>nr_buffers = 1560 <1>outstanding_credits = 1557 <1>state = 4 <1>state = 4 <1>start = 4300814543 <1>updates = 0 <0>------------[ cut here ]------------ <2>kernel BUG at fs/jbd2/commit.c:542! The nr_buffers value was 1560 while that of t_outstanding_credits was 1557. Let me know if i can provide any other information to debug this issue. Have attached dmesg log. Thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India --------------------------------- --------------000104020105070209070500 Content-Type: text/plain; name="log" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="log" ------------[ cut here ]------------ cpu 0x0: Vector: 700 (Program Check) at [c0000000fedeb970] pc: c000000000280f74: .jbd2_journal_commit_transaction+0x91c/0x1c6c lr: c000000000280f5c: .jbd2_journal_commit_transaction+0x904/0x1c6c sp: c0000000fedebbf0 msr: 8000000000029032 current = 0xc00000005e550c20 paca = 0xc000000000b62600 pid = 13149, comm = kjournald2 kernel BUG at fs/jbd2/commit.c:542! enter ? for help [c0000000fedebdd0] c000000000289cac .kjournald2+0x198/0x46c [c0000000fedebed0] c0000000000a86a0 .kthread+0xac/0xb8 [c0000000fedebf90] c00000000002ab3c .kernel_thread+0x54/0x70 0:mon> dl <4>Crash kernel location must be 0x2000000 <6>Reserving 256MB of memory at 32MB for crashkernel (System RAM: 4096MB) <6>Phyp-dump disabled at boot time <6>Using pSeries machine description <7>Page orders: linear mapping = 24, virtual = 16, io = 12, vmemmap = 24 <6>Using 1TB segments <4>Found initrd at 0xc0000000034d0000:0xc000000003c92a47 <6>console [udbg0] enabled <6>Partition configured for 4 cpus. <6>CPU maps initialized for 2 threads per core <7> (thread shift is 1) <4>Starting Linux PPC64 #5 SMP Thu Sep 3 17:40:05 IST 2009 <4>----------------------------------------------------- <4>ppc64_pft_size = 0x1a <4>physicalMemorySize = 0x100000000 <4>htab_hash_mask = 0x7ffff <4>----------------------------------------------------- <6>Initializing cgroup subsys cpuset <6>Initializing cgroup subsys cpu <5>Linux version 2.6.31-rc8-ext4 (root@llm62) (gcc version 4.3.2 [gcc-4_3-branch revision 141291] (SUSE Linux) ) #5 SMP Thu Sep 3 17:40:05 IST 2009 <4>[boot]0012 Setup Arch <7>Node 0 Memory: <7>Node 1 Memory: 0x0-0x100000000 <4>EEH: No capable adapters found <6>PPC64 nvram contains 15360 bytes <7>Using shared processor idle loop <4>Zone PFN ranges: <4> DMA 0x00000000 -> 0x00010000 <4> Normal 0x00010000 -> 0x00010000 <4>Movable zone start PFN for each node <4>early_node_map[1] active PFN ranges <4> 1: 0x00000000 -> 0x00010000 <4>Could not find start_pfn for node 0 <7>On node 0 totalpages: 0 <7>On node 1 totalpages: 65536 <7> DMA zone: 56 pages used for memmap <7> DMA zone: 0 pages reserved <7> DMA zone: 65480 pages, LIFO batch:1 <4>[boot]0015 Setup Done <4>Built 2 zonelists in Node order, mobility grouping on. Total pages: 65480 <4>Policy zone: DMA <5>Kernel command line: root=/dev/sda5 sysrq=1 insmod=sym53c8xx insmod=ipr crashkernel=512M-:256M <4>PID hash table entries: 4096 (order: 12, 32768 bytes) <4>freeing bootmem node 1 <6>Memory: 3898432k/4194304k available (8640k kernel code, 295872k reserved, 2048k data, 4267k bss, 512k init) <6>SLUB: Genslabs=18, HWalign=128, Order=0-3, MinObjects=0, CPUs=4, Nodes=16 <6>Hierarchical RCU implementation. <6>NR_IRQS:512 <4>[boot]0020 XICS Init <4>[boot]0021 XICS Done <7>pic: no ISA interrupt controller <7>time_init: decrementer frequency = 512.000000 MHz <7>time_init: processor frequency = 4704.000000 MHz <6>clocksource: timebase mult[7d0000] shift[22] registered <7>clockevent: decrementer mult[83126e97] shift[32] cpu[0] <4>Console: colour dummy device 80x25 <6>console handover: boot [udbg0] -> real [hvc0] <6>allocated 2621440 bytes of page_cgroup <6>please try 'cgroup_disable=memory' option if you don't want memory cgroups <6>Security Framework initialized <6>SELinux: Disabled at boot. <6>Dentry cache hash table entries: 524288 (order: 6, 4194304 bytes) <6>Inode-cache hash table entries: 262144 (order: 5, 2097152 bytes) <4>Mount-cache hash table entries: 4096 <6>Initializing cgroup subsys ns <6>Initializing cgroup subsys cpuacct <6>Initializing cgroup subsys memory <6>Initializing cgroup subsys devices <6>Initializing cgroup subsys freezer <7>irq: irq 2 on host null mapped to virtual irq 16 <7>clockevent: decrementer mult[83126e97] shift[32] cpu[1] <4>Processor 1 found. <7>clockevent: decrementer mult[83126e97] shift[32] cpu[2] <4>Processor 2 found. <7>clockevent: decrementer mult[83126e97] shift[32] cpu[3] <4>Processor 3 found. <6>Brought up 4 CPUs <7>Node 0 CPUs: 0-3 <7>Node 1 CPUs: <7>CPU0 attaching sched-domain: <7> domain 0: span 0-1 level SIBLING <7> groups: 0 1 <7> domain 1: span 0-3 level CPU <7> groups: 0-1 2-3 <7> domain 2: span 0-3 level NODE <7> groups: 0-3 (__cpu_power = 2048) <7>CPU1 attaching sched-domain: <7> domain 0: span 0-1 level SIBLING <7> groups: 1 0 <7> domain 1: span 0-3 level CPU <7> groups: 0-1 2-3 <7> domain 2: span 0-3 level NODE <7> groups: 0-3 (__cpu_power = 2048) <7>CPU2 attaching sched-domain: <7> domain 0: span 2-3 level SIBLING <7> groups: 2 3 <7> domain 1: span 0-3 level CPU <7> groups: 2-3 0-1 <7> domain 2: span 0-3 level NODE <7> groups: 0-3 (__cpu_power = 2048) <7>CPU3 attaching sched-domain: <7> domain 0: span 2-3 level SIBLING <7> groups: 3 2 <7> domain 1: span 0-3 level CPU <7> groups: 2-3 0-1 <7> domain 2: span 0-3 level NODE <7> groups: 0-3 (__cpu_power = 2048) <6>NET: Registered protocol family 16 <6>IBM eBus Device Driver <6>POWER6 performance monitor hardware support registered <6>PCI: Probing PCI hardware <7>PCI: Probing PCI hardware done <4>bio: create slab at 0 <6>usbcore: registered new interface driver usbfs <6>usbcore: registered new interface driver hub <6>usbcore: registered new device driver usb <6>NET: Registered protocol family 2 <6>IP route cache hash table entries: 32768 (order: 2, 262144 bytes) <6>TCP established hash table entries: 131072 (order: 5, 2097152 bytes) <6>TCP bind hash table entries: 65536 (order: 4, 1048576 bytes) <6>TCP: Hash tables configured (established 131072 bind 65536) <6>TCP reno registered <6>NET: Registered protocol family 1 <6>Unpacking initramfs... <7>Switched to high resolution mode on CPU 0 <7>Switched to high resolution mode on CPU 1 <7>Switched to high resolution mode on CPU 2 <7>Switched to high resolution mode on CPU 3 <7>irq: irq 655360 on host null mapped to virtual irq 17 <7>irq: irq 655362 on host null mapped to virtual irq 18 <6>IOMMU table initialized, virtual merging enabled <7>irq: irq 589825 on host null mapped to virtual irq 19 <7>RTAS daemon started <7>RTAS: event: 62, Type: Platform Error, Severity: 2 <6>audit: initializing netlink socket (disabled) <5>type=2000 audit(1251980114.240:1): initialized <6>HugeTLB registered 16 MB page size, pre-allocated 0 pages <6>HugeTLB registered 16 GB page size, pre-allocated 0 pages <5>VFS: Disk quotas dquot_6.5.2 <4>Dquot-cache hash table entries: 8192 (order 0, 65536 bytes) <6>msgmni has been set to 7612 <6>alg: No test for stdrng (krng) <6>Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254) <6>io scheduler noop registered <6>io scheduler anticipatory registered <6>io scheduler deadline registered <6>io scheduler cfq registered (default) <6>pci_hotplug: PCI Hot Plug PCI Core version: 0.5 <6>rpaphp: RPA HOT Plug PCI Controller Driver version: 0.1 <7>vio_register_driver: driver hvc_console registering <7>HVSI: registered 0 devices <6>Generic RTC Driver v1.07 <6>Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled <6>pmac_zilog: 0.6 (Benjamin Herrenschmidt ) <6>input: Macintosh mouse button emulation as /devices/virtual/input/input0 <6>Uniform Multi-Platform E-IDE driver <6>ide-gd driver 1.18 <6>IBM eHEA ethernet device driver (Release EHEA_0102) <7>irq: irq 590080 on host null mapped to virtual irq 256 <6>ehea: eth0: Jumbo frames are disabled <6>ehea: eth0 -> logical port id #2 <6>ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver <6>ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver <6>mice: PS/2 mouse device common for all mice <6>EDAC MC: Ver: 2.1.0 Aug 31 2009 <6>usbcore: registered new interface driver hiddev <6>usbcore: registered new interface driver usbhid <6>usbhid: v2.6:USB HID core driver <6>TCP cubic registered <6>NET: Registered protocol family 15 <4>registered taskstats version 1 <4>Freeing unused kernel memory: 512k freed <6>SysRq : Changing Loglevel <4>Loglevel set to 1 <5>SCSI subsystem initialized <7>vio_register_driver: driver ibmvscsi registering <6>ibmvscsi 30000002: SRP_VERSION: 16.a <6>scsi0 : IBM POWER Virtual SCSI Adapter 1.5.8 <6>ibmvscsi 30000002: partner initialization complete <6>ibmvscsi 30000002: host srp version: 16.a, host partition VIO (1), OS 3, max io 1048576 <3>ibmvscsi 30000002: fast_fail not supported in server <6>ibmvscsi 30000002: Client reserve enabled <6>ibmvscsi 30000002: sent SRP login <6>ibmvscsi 30000002: SRP_LOGIN succeeded <5>scsi 0:0:1:0: Direct-Access AIX VDASD 0001 PQ: 0 ANSI: 3 <6>udevd version 128 started <5>sd 0:0:1:0: [sda] 167772160 512-byte logical blocks: (85.8 GB/80.0 GiB) <5>sd 0:0:1:0: [sda] Write Protect is off <7>sd 0:0:1:0: [sda] Mode Sense: 17 00 00 08 <5>sd 0:0:1:0: [sda] Cache data unavailable <3>sd 0:0:1:0: [sda] Assuming drive cache: write through <5>sd 0:0:1:0: [sda] Cache data unavailable <3>sd 0:0:1:0: [sda] Assuming drive cache: write through <6> sda: sda1 sda2 < sda5 > sda3 sda4 <5>sd 0:0:1:0: [sda] Cache data unavailable <3>sd 0:0:1:0: [sda] Assuming drive cache: write through <5>sd 0:0:1:0: [sda] Attached SCSI disk <6>kjournald starting. Commit interval 5 seconds <6>EXT3 FS on sda5, internal journal <6>EXT3-fs: mounted filesystem with writeback data mode. <6>udevd version 128 started <5>sd 0:0:1:0: Attached scsi generic sg0 type 0 <6>Adding 1044096k swap on /dev/sda3. Priority:-1 extents:1 across:1044096k <6>device-mapper: uevent: version 1.0.3 <6>device-mapper: ioctl: 4.15.0-ioctl (2009-04-01) initialised: dm-devel@redhat.com <6>loop: module loaded <6>fuse init (API version 7.12) <7>irq: irq 780 on host null mapped to virtual irq 268 <6>ehea: eth0: Physical port up <6>ehea: External switch port is backup port <7>irq: irq 781 on host null mapped to virtual irq 269 <6>NET: Registered protocol family 10 <6>lo: Disabled Privacy Extensions <7>eth0: no IPv6 routers present <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 2470, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <6>EXT4-fs (sda4): delayed allocation enabled <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with ordered data mode <6>EXT4-fs: mballoc: 0 blocks 0 reqs (0 success) <6>EXT4-fs: mballoc: 0 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost <6>EXT4-fs: mballoc: 0 generated and it took 0 <6>EXT4-fs: mballoc: 0 preallocated, 0 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 2496, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <6>EXT4-fs (sda4): delayed allocation enabled <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with ordered data mode <6>EXT4-fs: mballoc: 6316218 blocks 10869 reqs (2718 success) <6>EXT4-fs: mballoc: 27518 extents scanned, 2341 goal hits, 4450 2^N hits, 0 breaks, 0 lost <6>EXT4-fs: mballoc: 896 generated and it took 148897 <6>EXT4-fs: mballoc: 6538210 preallocated, 6274779 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 2577, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <6>EXT4-fs (sda4): delayed allocation enabled <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with ordered data mode <6>EXT4-fs: mballoc: 19076715 blocks 456774 reqs (317263 success) <6>EXT4-fs: mballoc: 18713654 extents scanned, 2719 goal hits, 105504 2^N hits, 92395 breaks, 5 lost <6>EXT4-fs: mballoc: 2920 generated and it took 1307140 <6>EXT4-fs: mballoc: 6234268 preallocated, 4510097 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 2644, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <6>EXT4-fs (sda4): delayed allocation enabled <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with ordered data mode <6>EXT4-fs: mballoc: 6220451 blocks 7639 reqs (5005 success) <6>EXT4-fs: mballoc: 155191 extents scanned, 2611 goal hits, 3143 2^N hits, 702 breaks, 35 lost <6>EXT4-fs: mballoc: 5198 generated and it took 1487446 <6>EXT4-fs: mballoc: 3712797 preallocated, 255769 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 22997, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <4>EXT4-fs (sda4): Ignoring delalloc option - requested data journaling mode <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with journalled data mode <6>EXT4-fs: mballoc: 0 blocks 0 reqs (0 success) <6>EXT4-fs: mballoc: 0 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost <6>EXT4-fs: mballoc: 0 generated and it took 0 <6>EXT4-fs: mballoc: 0 preallocated, 0 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 23022, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <4>EXT4-fs (sda4): Ignoring delalloc option - requested data journaling mode <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with journalled data mode <6>EXT4-fs: mballoc: 614411 blocks 14001 reqs (1591 success) <6>EXT4-fs: mballoc: 84926 extents scanned, 2606 goal hits, 7016 2^N hits, 0 breaks, 0 lost <6>EXT4-fs: mballoc: 56 generated and it took 24655 <6>EXT4-fs: mballoc: 3030592 preallocated, 1996613 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 23097, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <4>EXT4-fs (sda4): Ignoring delalloc option - requested data journaling mode <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with journalled data mode <6>EXT4-fs: mballoc: 83691 blocks 83691 reqs (0 success) <6>EXT4-fs: mballoc: 4557305 extents scanned, 28226 goal hits, 32220 2^N hits, 22231 breaks, 0 lost <6>EXT4-fs: mballoc: 183 generated and it took 169061 <6>EXT4-fs: mballoc: 5727024 preallocated, 1058154 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 23164, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <4>EXT4-fs (sda4): Ignoring delalloc option - requested data journaling mode <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with journalled data mode <6>EXT4-fs: mballoc: 846 blocks 846 reqs (0 success) <6>EXT4-fs: mballoc: 846 extents scanned, 69 goal hits, 777 2^N hits, 0 breaks, 0 lost <6>EXT4-fs: mballoc: 40 generated and it took 20887 <6>EXT4-fs: mballoc: 1171942 preallocated, 42496 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 24964, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <6>EXT4-fs (sda4): delayed allocation enabled <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with ordered data mode <6>EXT4-fs: mballoc: 18741536 blocks 32464 reqs (8049 success) <6>EXT4-fs: mballoc: 299662 extents scanned, 6400 goal hits, 12567 2^N hits, 1020 breaks, 0 lost <6>EXT4-fs: mballoc: 2408 generated and it took 399674 <6>EXT4-fs: mballoc: 18770332 preallocated, 17992765 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 25162, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <6>EXT4-fs (sda4): delayed allocation enabled <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with ordered data mode <6>EXT4-fs: mballoc: 6530971 blocks 8232 reqs (5365 success) <6>EXT4-fs: mballoc: 167871 extents scanned, 2905 goal hits, 3279 2^N hits, 765 breaks, 56 lost <6>EXT4-fs: mballoc: 5704 generated and it took 1692089 <6>EXT4-fs: mballoc: 3997891 preallocated, 254614 discarded <6>EXT4-fs (sda4): barriers enabled <6>kjournald2 starting: pid 13149, dev sda4:8, commit interval 5 seconds <6>EXT4-fs (sda4): internal journal on sda4:8 <4>EXT4-fs (sda4): Ignoring delalloc option - requested data journaling mode <6>EXT4-fs: file extents enabled <6>EXT4-fs: mballoc enabled <6>EXT4-fs (sda4): mounted filesystem with journalled data mode <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089515). There's a risk of filesystem corruption in case of system crash. <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089516). There's a risk of filesystem corruption in case of system crash. <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089517). There's a risk of filesystem corruption in case of system crash. <4>JBD: Spotted dirty metadata buffer (dev = sda4, blocknr = 1089518). There's a risk of filesystem corruption in case of system crash. <1>nr_buffers = 1560 <1>outstanding_credits = 1557 <1>state = 4 <1>state = 4 <1>start = 4300814543 <1>updates = 0 <0>------------[ cut here ]------------ <2>kernel BUG at fs/jbd2/commit.c:542! 0:mon> 0:mon> r R00 = 0000000000000001 R16 = c00000005e6dc560 R01 = c0000000fedebbf0 R17 = 0000000000000000 R02 = c000000000a6f1f8 R18 = 0000000000000000 R03 = 0000000000000012 R19 = 0000000000000409 R04 = 0000000000000000 R20 = 0000000000000001 R05 = ffffffffffffffff R21 = 0000000000000001 R06 = 0000000000000002 R22 = c0000000fedebc78 R07 = c000000000779d51 R23 = 0000000000000000 R08 = c000000000c07248 R24 = c0000000f3e1b800 R09 = 0000000000000618 R25 = c00000005e6dc570 R10 = c000000000c07750 R26 = c00000005e6dc500 R11 = 0000000000000001 R27 = c00000005e6dc550 R12 = 0000000028000082 R28 = c0000000fedebc78 R13 = c000000000b62600 R29 = c000000000779d23 R14 = c0000000008325c8 R30 = c0000000009ec158 R15 = c0000000f3e1bb9c R31 = 0000000000000000 pc = c000000000280f74 .jbd2_journal_commit_transaction+0x91c/0x1c6c lr = c000000000280f5c .jbd2_journal_commit_transaction+0x904/0x1c6c msr = 8000000000029032 cr = 28000084 ctr = 0000000000000001 xer = 0000000020000001 trap = 700 0:mon> --------------000104020105070209070500--