From: Matteo Croce Subject: Re: ext4: journal has aborted Date: Tue, 1 Jul 2014 10:55:11 +0200 Message-ID: References: <20140701082619.1ac77f1d@archvile> <20140701084206.GG9743@birch.djwong.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: David Jander , linux-ext4@vger.kernel.org, "Theodore Ts'o" To: "Darrick J. Wong" Return-path: Received: from mail-oa0-f41.google.com ([209.85.219.41]:60222 "EHLO mail-oa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757673AbaGAIzw (ORCPT ); Tue, 1 Jul 2014 04:55:52 -0400 Received: by mail-oa0-f41.google.com with SMTP id l6so10156761oag.14 for ; Tue, 01 Jul 2014 01:55:52 -0700 (PDT) In-Reply-To: <20140701084206.GG9743@birch.djwong.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: 2014-07-01 10:42 GMT+02:00 Darrick J. Wong : > On Tue, Jul 01, 2014 at 08:26:19AM +0200, David Jander wrote: >> >> Hi, >> >> On Mon, 30 Jun 2014 23:30:10 +0200 >> Matteo Croce wrote: >> >> > I was web surfing and using gimp when: >> > >> > EXT4-fs error (device sda2): ext4_mb_generate_buddy:756: group 199, >> > 9414 clusters in bitmap, 9500 in gd; block bitmap corrupt. >> >> I was about to post a related question to this list. I am also seeing these >> kind of errors when using ext4 on latest mainline (I began testing with 3.15 >> where I saw this and now in 3.16-rc3 it is still there). >> It happens almost instantly when power-cycling the system (unclean shutdown). >> The next time the system boots, I get these errors. >> >> AFAICT, you are using a pretty recent kernel. Which version exactly? >> >> > Aborting journal on device sda2-8. >> > EXT4-fs (sda2): Remounting filesystem read-only > > Matteo, could you please post the full dmesg log somewhere? I'm interested in > what happens before all this happens, because... I've rebooted the notebook twice >> > ------------[ cut here ]------------ >> > WARNING: CPU: 6 PID: 4134 at fs/ext4/ext4_jbd2.c:259 >> > __ext4_handle_dirty_metadata+0x18e/0x1d0() >> > Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek >> > snd_hda_codec_generic ecb uvcvideo videobuf2_vmalloc videobuf2_memops >> > videobuf2_core videodev ath3k btusb rts5139(C) ctr ccm iTCO_wdt bnep >> > rfcomm bluetooth nls_iso8859_1 vfat fat arc4 intel_rapl >> > x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm >> > snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm >> > aesni_intel aes_x86_64 snd_seq_midi snd_seq_midi_event ath9k led_class >> > glue_helper ath9k_common lrw gf128mul ath9k_hw ablk_helper cryptd ath >> > mac80211 snd_rawmidi snd_seq cfg80211 radeon microcode rfkill >> > snd_timer snd_seq_device sr_mod psmouse r8169 snd cdrom i915 lpc_ich >> > soundcore ttm mii mfd_core drm_kms_helper drm intel_gtt agpgart >> > ehci_pci mei_me xhci_hcd tpm_infineon ehci_hcd video mei wmi tpm >> > backlight >> > CPU: 6 PID: 4134 Comm: gimp-2.8 Tainted: G C 3.15.0 #6 >> > 0000000000000009 ffffffff813acbdd 0000000000000000 ffffffff8103de3d >> > ffff8802365231a0 00000000ffffffe2 0000000000000000 ffff8800b90816c0 >> > ffffffff814205a0 ffffffff8118879e 0000000000000005 ffff8802365231a0 >> > Call Trace: >> > [] ? dump_stack+0x41/0x51 >> > [] ? warn_slowpath_common+0x6d/0x90 >> > [] ? __ext4_handle_dirty_metadata+0x18e/0x1d0 >> > [] ? ext4_dirty_inode+0x20/0x50 >> > [] ? ext4_free_blocks+0x539/0xa40 >> > [] ? ext4_ext_remove_space+0x83b/0xe60 >> > [] ? ext4_ext_truncate+0x98/0xc0 >> > [] ? ext4_truncate+0x2b5/0x300 >> > [] ? ext4_evict_inode+0x3d8/0x410 >> > [] ? evict+0xa6/0x160 >> > [] ? do_unlinkat+0x186/0x2a0 >> > [] ? SyS_getdents+0xde/0x100 >> > [] ? fillonedir+0xd0/0xd0 >> > [] ? system_call_fastpath+0x1a/0x1f >> > ---[ end trace 795411398e41fbcb ]--- >> > EXT4: jbd2_journal_dirty_metadata failed: handle type 5 started at >> > line 241, credits 91/91, errcode -30 >> > EXT4: jbd2_journal_dirty_metadata failed: handle type 5 started at >> > line 241, credits 91/91, errcode -30<2>EXT4-fs error (device sda2) in >> > ext4_free_blocks:4867: Journal has aborted >> > EXT4-fs error (device sda2): ext4_ext_rm_leaf:2731: inode #8257653: >> > block 6520936: comm gimp-2.8: journal_dirty_metadata failed: handle >> > type 5 started at line 241, credits 91/91, errcode -30 >> > EXT4-fs error (device sda2) in ext4_ext_remove_space:3018: Journal has >> > aborted EXT4-fs error (device sda2) in ext4_ext_truncate:4666: Journal has >> > aborted EXT4-fs error (device sda2) in ext4_reserve_inode_write:4877: Journal >> > has aborted >> > EXT4-fs error (device sda2) in ext4_truncate:3788: Journal has aborted >> > EXT4-fs error (device sda2) in ext4_reserve_inode_write:4877: Journal >> > has aborted >> > EXT4-fs error (device sda2) in ext4_orphan_del:2684: Journal has aborted >> > EXT4-fs error (device sda2) in ext4_reserve_inode_write:4877: Journal >> > has aborted >> >> I did not get these errors. I suspect this may be a consequence of FS >> corruption due to a bug in etx4. >> >> Here's why I suspect a bug: >> >> I am running latest git head (3.16-rc3+ as of yesterday) on an ARM system with >> eMMC flash. The eMMC is formatted in SLC mode ("enhanced" mode according to >> eMMC 4.41) and "reliable-writes" are enabled, so power-cycling should not >> cause FS corruption in presence of a journal. I have a Samsung SSD 840 PRO >> I can format the eMMC device either as EXT3 or EXT4 for the test. After >> formatting and writing the rootfs to the partition I can boot successfully in >> either situation. Once booted from eMMC, I start bonnie++ (to just stress the >> FS for a while), and after a minute or so the board is power-cycled while >> bonnie++ is still running. >> >> Next time I boot the situation is this: >> >> With EXT3: All seems fine, journal is replayed, no errors. I can repeat this as >> many times as I want, FS stays consistent. >> >> With EXT4: After just one power cycle I start getting this: >> >> [ 7.603871] EXT4-fs error (device mmcblk0p2): ext4_mb_generate_buddy:757: group 1, 8542 clusters in bitmap, 8550 in gd; block bitmap corrupt. >> [ 7.616743] JBD2: Spotted dirty metadata buffer (dev = mmcblk0p2, blocknr = 0). There's a risk of filesystem corruption in case of system crash. > > I've been seeing this same set of symptoms with 3.15.0 on various SSDs (Samsung > 840 Pro, Crucial M4). It seems that something (upstart?) is holding open some > file or other during poweroff, which means that the root fs can't be unmounted > or even remounted rw. I also noticed that the next time the system comes up, > the kernel tells me that it has to process the inode orphan list as part of > recovery. > > Shortly after the orphan list gets processed, I get that message and the FS > goes ro. A subsequent fsck run reveals that the block bitmap is indeed > incorrect in that block group, and when I bd the blocks that are incorrect in > the bitmap, I see what could be some kind of upstart log file. Either way, I > suspect some bug in orphan processing. > > I don't know if this is specific to SSDs or spinning rust. Right now > I've simply rigged the initramfs to e2fsck -p the root fs before mounting it, > which seems(?) to have patched around it for now. > >> If I continue the test, it doesn't take long and serious corruption starts >> occurring. > > You're getting actual FS data corruption too? Or more of those messages? Actually it seems that there are no corruption > --D >> >> Again, with EXT3 I am unable to detect any problems. >> >> Best regards, >> >> -- >> David Jander >> Protonic Holland. >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- Matteo Croce OpenWrt Developer