Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755543Ab0G2SUO (ORCPT ); Thu, 29 Jul 2010 14:20:14 -0400 Received: from moutng.kundenserver.de ([212.227.17.10]:64860 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753755Ab0G2SUL (ORCPT ); Thu, 29 Jul 2010 14:20:11 -0400 Message-ID: <4C51C65C.3080006@vlnb.net> Date: Thu, 29 Jul 2010 22:20:12 +0400 From: Vladislav Bolkhovitin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.10) Gecko/20100527 Thunderbird/3.0.5 MIME-Version: 1.0 To: Jan Kara CC: Christoph Hellwig , "Ted Ts'o" , Tejun Heo , Vivek Goyal , jaxboe@fusionio.com, James.Bottomley@suse.de, linux-fsdevel@vger.kernel.org, linux-scsi@vger.kernel.org, chris.mason@oracle.com, swhiteho@redhat.com, konishi.ryusuke@lab.ntt.co.jp, linux-kernel@vger.kernel.org Subject: Re: extfs reliability References: <20100728082447.GA7668@lst.de> <4C4FECFE.9040509@kernel.org> <20100728085048.GA8884@lst.de> <4C4FF136.5000205@kernel.org> <20100728090025.GA9252@lst.de> <4C4FF592.9090800@kernel.org> <20100728092859.GA11096@lst.de> <20100729014431.GD4506@thunk.org> <20100729083142.GA30077@lst.de> <4C517B5A.3020905@vlnb.net> <20100729142650.GA12690@quack.suse.cz> In-Reply-To: <20100729142650.GA12690@quack.suse.cz> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:8rhyVOAaexFPicsEfvsgFSqGdYUXGeU8kBVj+boojrR 1ILOSF9elx6xLkAEn7qbRgmSr5JNUWytdxkSV+YL841ptsQDWK uK1MuJoonVvt6qnwpTDylEyvTWb0sUikzJ+vYyLY9vVHiLAedj HSA1nuIkL/W+psnXHEmgIior4LhCDZAt1qBn04gSU3Pwkjt5QH 4YsBbdFVnjvIXQoYX4+AQ== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 17798 Lines: 340 Jan Kara, on 07/29/2010 06:26 PM wrote: >> root@ini:/mnt/dbench-mod# ^C >> root@ini:/mnt/dbench-mod# ^C >> root@ini:~# umount /mnt >> Segmentation fault > This isn't OK of course ;) > >> Kernel log: >> >> Jul 29 19:55:35 ini kernel: [ 3044.722313] c2c28e40: 00023740 00023741 00023742 00023743 @7..A7..B7..C7.. >> Jul 29 19:55:35 ini kernel: [ 3044.722320] c2c28e50: 00023744 00023745 00023746 00023747 D7..E7..F7..G7.. >> Jul 29 19:55:35 ini kernel: [ 3044.722327] c2c28e60: 00023748 00023749 0002374a 0002374b H7..I7..J7..K7.. >> Jul 29 19:55:35 ini kernel: [ 3044.722334] c2c28e70: 0002372c 00000000 00000000 00000000 ,7.............. >> Jul 29 19:55:35 ini kernel: [ 3044.722341] c2c28e80: 00000000 00000000 00000000 00000002 ................ > ... > Sadly these messages above seem to have overwritten beginning of the > message below. Hmm, but maybe it's just a warning message about inode still > being on orphan list because the next oops still shows untainted kernel. You can find previous messages in the attachments I attached to the report. They are big (500K and 1M), so I compressed and attached them. >> Jul 29 19:55:35 ini kernel: [ 3044.722546] Pid: 1299, comm: umount Not tainted 2.6.32-22-386 #36-Ubuntu >> Jul 29 19:55:35 ini kernel: [ 3044.722550] Call Trace: >> Jul 29 19:55:35 ini kernel: [ 3044.722567] [] ext4_destroy_inode+0x91/0xa0 >> Jul 29 19:55:35 ini kernel: [ 3044.722577] [] destroy_inode+0x24/0x40 >> Jul 29 19:55:35 ini kernel: [ 3044.722583] [] dispose_list+0x8e/0x100 >> Jul 29 19:55:35 ini kernel: [ 3044.722588] [] invalidate_inodes+0xf4/0x120 >> Jul 29 19:55:35 ini kernel: [ 3044.722598] [] ? vfs_quota_off+0x0/0x20 >> Jul 29 19:55:35 ini kernel: [ 3044.722606] [] generic_shutdown_super+0x42/0xe0 >> Jul 29 19:55:35 ini kernel: [ 3044.722612] [] kill_block_super+0x2a/0x50 >> Jul 29 19:55:35 ini kernel: [ 3044.722618] [] deactivate_super+0x64/0x90 >> Jul 29 19:55:35 ini kernel: [ 3044.722625] [] mntput_no_expire+0x8f/0xe0 >> Jul 29 19:55:35 ini kernel: [ 3044.722631] [] sys_umount+0x47/0xa0 >> Jul 29 19:55:35 ini kernel: [ 3044.722636] [] sys_oldumount+0x1e/0x20 >> Jul 29 19:55:35 ini kernel: [ 3044.722643] [] syscall_call+0x7/0xb >> Jul 29 19:55:35 ini kernel: [ 3044.731043] sd 6:0:0:0: [sdb] Unhandled error code >> Jul 29 19:55:35 ini kernel: [ 3044.731049] sd 6:0:0:0: [sdb] Result: hostbyte=DID_TRANSPORT_FAILFAST driverbyte=DRIVER_OK >> Jul 29 19:55:35 ini kernel: [ 3044.731056] sd 6:0:0:0: [sdb] CDB: Write(10): 2a 00 00 00 00 00 00 00 01 00 >> Jul 29 19:55:35 ini kernel: [ 3044.743469] __ratelimit: 37 callbacks suppressed >> Jul 29 19:55:35 ini kernel: [ 3044.755695] lost page write due to I/O error on sdb >> Jul 29 19:55:36 ini kernel: [ 3044.823044] Modules linked in: crc32c ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi w83627hf hwmon_vid fbcon tileblit font bitblit softcursor ppdev adm1021 i2c_i801 vga16fb vgastate e7xxx_edac psmouse serio_raw parport_pc shpchp edac_core lp parport qla2xxx ohci1394 scsi_transport_fc r8169 sata_via ieee1394 mii scsi_tgt e1000 floppy > So here probably starts the real oops. It isn't yet an oops, it's dump_stack() from ext4_destroy_inode() together with hex dump: static void ext4_destroy_inode(struct inode *inode) { if (!list_empty(&(EXT4_I(inode)->i_orphan))) { ext4_msg(inode->i_sb, KERN_ERR, "Inode %lu (%p): orphan list check failed!", inode->i_ino, EXT4_I(inode)); print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, EXT4_I(inode), sizeof(struct ext4_inode_info), true); dump_stack(); } kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); } > But sadly we are missing the > beginning as well. It was also in the attached file. > Can you send me disassembly of your ext4_put_super? In System.map-2.6.32-22-386: c0293940 t ext4_put_super c0293c90 t ext4_quota_write $ objdump -d --start-address=0xc0293940 vmlinux >ext4_put_super ^C $ cat ext4_put_super vmlinux: file format elf32-i386 Disassembly of section .text: c0293940 <.text+0x193940>: c0293940: 55 push %ebp c0293941: 89 e5 mov %esp,%ebp c0293943: 57 push %edi c0293944: 56 push %esi c0293945: 53 push %ebx c0293946: 83 ec 28 sub $0x28,%esp c0293949: e8 02 07 e7 ff call 0xc0104050 c029394e: 8b 98 84 01 00 00 mov 0x184(%eax),%ebx c0293954: 89 c6 mov %eax,%esi c0293956: 8b 83 2c 02 00 00 mov 0x22c(%ebx),%eax c029395c: 8b 7b 38 mov 0x38(%ebx),%edi c029395f: e8 ac b5 ec ff call 0xc015ef10 c0293964: 8b 83 2c 02 00 00 mov 0x22c(%ebx),%eax c029396a: e8 41 af ec ff call 0xc015e8b0 c029396f: 89 f0 mov %esi,%eax c0293971: e8 5a 86 f6 ff call 0xc01fbfd0 c0293976: e8 05 5a 2e 00 call 0xc0579380 c029397b: 80 7e 11 00 cmpb $0x0,0x11(%esi) c029397f: 0f 85 0b 02 00 00 jne 0xc0293b90 c0293985: 8b 83 34 01 00 00 mov 0x134(%ebx),%eax c029398b: 85 c0 test %eax,%eax c029398d: 74 17 je 0xc02939a6 c029398f: e8 ec 64 02 00 call 0xc02b9e80 c0293994: c7 83 34 01 00 00 00 movl $0x0,0x134(%ebx) c029399b: 00 00 00 c029399e: 85 c0 test %eax,%eax c02939a0: 0f 88 ff 01 00 00 js 0xc0293ba5 c02939a6: 89 f0 mov %esi,%eax c02939a8: e8 c3 22 01 00 call 0xc02a5c70 c02939ad: 89 f0 mov %esi,%eax c02939af: e8 0c dc 00 00 call 0xc02a15c0 c02939b4: 89 f0 mov %esi,%eax c02939b6: e8 c5 51 00 00 call 0xc0298b80 c02939bb: 89 f0 mov %esi,%eax c02939bd: e8 de 45 01 00 call 0xc02a7fa0 c02939c2: f6 46 30 01 testb $0x1,0x30(%esi) c02939c6: 0f 84 9c 01 00 00 je 0xc0293b68 c02939cc: 8b 93 f8 00 00 00 mov 0xf8(%ebx),%edx c02939d2: 85 d2 test %edx,%edx c02939d4: 74 11 je 0xc02939e7 c02939d6: 8b 15 c8 8a 8a c0 mov 0xc08a8ac8,%edx c02939dc: 8d 86 64 01 00 00 lea 0x164(%esi),%eax c02939e2: e8 59 fd fa ff call 0xc0243740 c02939e7: 8d bb fc 00 00 00 lea 0xfc(%ebx),%edi c02939ed: 89 f8 mov %edi,%eax c02939ef: e8 7c 5f 0a 00 call 0xc0339970 c02939f4: 8b 43 14 mov 0x14(%ebx),%eax c02939f7: 85 c0 test %eax,%eax c02939f9: 0f 84 c3 01 00 00 je 0xc0293bc2 c02939ff: 31 d2 xor %edx,%edx c0293a01: 8b 4b 3c mov 0x3c(%ebx),%ecx c0293a04: 31 c0 xor %eax,%eax c0293a06: 89 75 f0 mov %esi,-0x10(%ebp) c0293a09: 89 de mov %ebx,%esi c0293a0b: 89 d3 mov %edx,%ebx c0293a0d: 8d 76 00 lea 0x0(%esi),%esi c0293a10: 8b 04 81 mov (%ecx,%eax,4),%eax c0293a13: 85 c0 test %eax,%eax c0293a15: 74 08 je 0xc0293a1f c0293a17: e8 54 ab f8 ff call 0xc021e570 c0293a1c: 8b 4e 3c mov 0x3c(%esi),%ecx c0293a1f: 83 c3 01 add $0x1,%ebx c0293a22: 39 5e 14 cmp %ebx,0x14(%esi) c0293a25: 89 d8 mov %ebx,%eax c0293a27: 77 e7 ja 0xc0293a10 c0293a29: 89 f3 mov %esi,%ebx c0293a2b: 8b 75 f0 mov -0x10(%ebp),%esi c0293a2e: 89 c8 mov %ecx,%eax c0293a30: e8 fb bb f5 ff call 0xc01ef630 c0293a35: 8b 15 2c 53 8a c0 mov 0xc08a532c,%edx c0293a3b: 8b 83 28 02 00 00 mov 0x228(%ebx),%eax c0293a41: 81 c2 00 00 80 00 add $0x800000,%edx c0293a47: 39 d0 cmp %edx,%eax c0293a49: 72 20 jb 0xc0293a6b c0293a4b: 8b 15 c0 17 75 c0 mov 0xc07517c0,%edx c0293a51: 81 ea 00 20 60 00 sub $0x602000,%edx c0293a57: 81 e2 00 00 c0 ff and $0xffc00000,%edx c0293a5d: 81 ea 00 20 00 00 sub $0x2000,%edx c0293a63: 39 d0 cmp %edx,%eax c0293a65: 0f 82 ed 00 00 00 jb 0xc0293b58 c0293a6b: e8 c0 bb f5 ff call 0xc01ef630 c0293a70: 8d 83 94 00 00 00 lea 0x94(%ebx),%eax c0293a76: e8 c5 42 0b 00 call 0xc0347d40 c0293a7b: 8d 83 ac 00 00 00 lea 0xac(%ebx),%eax c0293a81: e8 ba 42 0b 00 call 0xc0347d40 c0293a86: 8d 83 c4 00 00 00 lea 0xc4(%ebx),%eax c0293a8c: e8 af 42 0b 00 call 0xc0347d40 c0293a91: 8d 83 dc 00 00 00 lea 0xdc(%ebx),%eax c0293a97: e8 a4 42 0b 00 call 0xc0347d40 c0293a9c: 8b 43 34 mov 0x34(%ebx),%eax c0293a9f: 85 c0 test %eax,%eax c0293aa1: 74 05 je 0xc0293aa8 c0293aa3: e8 c8 aa f8 ff call 0xc021e570 c0293aa8: 8b 83 78 01 00 00 mov 0x178(%ebx),%eax c0293aae: e8 7d bb f5 ff call 0xc01ef630 c0293ab3: 8b 83 7c 01 00 00 mov 0x17c(%ebx),%eax c0293ab9: e8 72 bb f5 ff call 0xc01ef630 c0293abe: 8d 93 38 01 00 00 lea 0x138(%ebx),%edx c0293ac4: 3b 93 38 01 00 00 cmp 0x138(%ebx),%edx c0293aca: 0f 85 fa 00 00 00 jne 0xc0293bca c0293ad0: 8b 86 94 00 00 00 mov 0x94(%esi),%eax c0293ad6: e8 65 b4 f8 ff call 0xc021ef40 c0293adb: 8b 83 74 01 00 00 mov 0x174(%ebx),%eax c0293ae1: 85 c0 test %eax,%eax c0293ae3: 74 31 je 0xc0293b16 c0293ae5: 3b 86 94 00 00 00 cmp 0x94(%esi),%eax c0293aeb: 74 29 je 0xc0293b16 c0293aed: e8 4e 0f f9 ff call 0xc0224a40 c0293af2: 8b 83 74 01 00 00 mov 0x174(%ebx),%eax c0293af8: e8 43 b4 f8 ff call 0xc021ef40 c0293afd: 8b 83 74 01 00 00 mov 0x174(%ebx),%eax c0293b03: 85 c0 test %eax,%eax c0293b05: 74 0f je 0xc0293b16 c0293b07: e8 64 d7 ff ff call 0xc0291270 c0293b0c: c7 83 74 01 00 00 00 movl $0x0,0x174(%ebx) c0293b13: 00 00 00 c0293b16: c7 86 84 01 00 00 00 movl $0x0,0x184(%esi) c0293b1d: 00 00 00 c0293b20: e8 2b 58 2e 00 call 0xc0579350 c0293b25: 89 f0 mov %esi,%eax c0293b27: e8 c4 84 f6 ff call 0xc01fbff0 c0293b2c: 89 f8 mov %edi,%eax c0293b2e: e8 7d 5d 0a 00 call 0xc03398b0 c0293b33: 8d 83 20 01 00 00 lea 0x120(%ebx),%eax c0293b39: e8 d2 3b 2e 00 call 0xc0577710 c0293b3e: 8b 83 f4 00 00 00 mov 0xf4(%ebx),%eax c0293b44: e8 e7 ba f5 ff call 0xc01ef630 c0293b49: 89 d8 mov %ebx,%eax c0293b4b: e8 e0 ba f5 ff call 0xc01ef630 c0293b50: 83 c4 28 add $0x28,%esp c0293b53: 5b pop %ebx c0293b54: 5e pop %esi c0293b55: 5f pop %edi c0293b56: 5d pop %ebp c0293b57: c3 ret c0293b58: e8 e3 db f4 ff call 0xc01e1740 c0293b5d: 8d 76 00 lea 0x0(%esi),%esi c0293b60: e9 0b ff ff ff jmp 0xc0293a70 c0293b65: 8d 76 00 lea 0x0(%esi),%esi c0293b68: 8b 86 84 01 00 00 mov 0x184(%esi),%eax c0293b6e: ba 01 00 00 00 mov $0x1,%edx c0293b73: 8b 40 38 mov 0x38(%eax),%eax c0293b76: 83 60 60 fb andl $0xfffffffb,0x60(%eax) c0293b7a: 0f b7 43 58 movzwl 0x58(%ebx),%eax c0293b7e: 66 89 47 3a mov %ax,0x3a(%edi) c0293b82: 89 f0 mov %esi,%eax c0293b84: e8 67 e5 ff ff call 0xc02920f0 c0293b89: e9 3e fe ff ff jmp 0xc02939cc c0293b8e: 66 90 xchg %ax,%ax c0293b90: ba 01 00 00 00 mov $0x1,%edx c0293b95: 89 f0 mov %esi,%eax c0293b97: e8 54 e5 ff ff call 0xc02920f0 c0293b9c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi c0293ba0: e9 e0 fd ff ff jmp 0xc0293985 c0293ba5: 89 34 24 mov %esi,(%esp) c0293ba8: c7 44 24 08 bf 9c 6c movl $0xc06c9cbf,0x8(%esp) c0293baf: c0 c0293bb0: c7 44 24 04 64 3e 59 movl $0xc0593e64,0x4(%esp) c0293bb7: c0 c0293bb8: e8 d3 f1 ff ff call 0xc0292d90 c0293bbd: e9 e4 fd ff ff jmp 0xc02939a6 c0293bc2: 8b 4b 3c mov 0x3c(%ebx),%ecx c0293bc5: e9 64 fe ff ff jmp 0xc0293a2e c0293bca: 8b 43 38 mov 0x38(%ebx),%eax c0293bcd: 8b 80 e8 00 00 00 mov 0xe8(%eax),%eax c0293bd3: 89 55 e8 mov %edx,-0x18(%ebp) c0293bd6: c7 44 24 08 be a9 6c movl $0xc06ca9be,0x8(%esp) c0293bdd: c0 c0293bde: c7 44 24 04 b9 0c 6a movl $0xc06a0cb9,0x4(%esp) c0293be5: c0 c0293be6: 89 44 24 0c mov %eax,0xc(%esp) c0293bea: 89 34 24 mov %esi,(%esp) c0293bed: e8 be d8 ff ff call 0xc02914b0 c0293bf2: c7 04 24 f6 9c 6c c0 movl $0xc06c9cf6,(%esp) c0293bf9: e8 4d 2e 2e 00 call 0xc0576a4b c0293bfe: 8b 83 38 01 00 00 mov 0x138(%ebx),%eax c0293c04: 8b 55 e8 mov -0x18(%ebp),%edx c0293c07: 89 45 f0 mov %eax,-0x10(%ebp) c0293c0a: 89 55 ec mov %edx,-0x14(%ebp) c0293c0d: 8b 55 f0 mov -0x10(%ebp),%edx c0293c10: 8b 02 mov (%edx),%eax c0293c12: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi c0293c16: 39 55 ec cmp %edx,-0x14(%ebp) c0293c19: 75 13 jne 0xc0293c2e c0293c1b: 8b 55 ec mov -0x14(%ebp),%edx c0293c1e: 3b 93 38 01 00 00 cmp 0x138(%ebx),%edx c0293c24: 0f 84 a6 fe ff ff je 0xc0293ad0 c0293c2a: 0f 0b ud2a c0293c2c: eb fe jmp 0xc0293c2c c0293c2e: 8b 55 f0 mov -0x10(%ebp),%edx c0293c31: 8b 45 f0 mov -0x10(%ebp),%eax c0293c34: 83 c2 20 add $0x20,%edx c0293c37: 8b 4a c0 mov -0x40(%edx),%ecx c0293c3a: 83 e8 68 sub $0x68,%eax c0293c3d: 89 4c 24 18 mov %ecx,0x18(%esp) c0293c41: 8b 88 b0 00 00 00 mov 0xb0(%eax),%ecx c0293c47: 89 4c 24 14 mov %ecx,0x14(%esp) c0293c4b: 0f b7 88 fa 00 00 00 movzwl 0xfa(%eax),%ecx c0293c52: 89 54 24 0c mov %edx,0xc(%esp) c0293c56: 89 4c 24 10 mov %ecx,0x10(%esp) c0293c5a: 8b 90 a8 00 00 00 mov 0xa8(%eax),%edx c0293c60: 89 54 24 08 mov %edx,0x8(%esp) c0293c64: 8b 80 2c 01 00 00 mov 0x12c(%eax),%eax c0293c6a: c7 04 24 54 b0 6b c0 movl $0xc06bb054,(%esp) c0293c71: 05 64 01 00 00 add $0x164,%eax c0293c76: 89 44 24 04 mov %eax,0x4(%esp) c0293c7a: e8 cc 2d 2e 00 call 0xc0576a4b c0293c7f: 8b 55 f0 mov -0x10(%ebp),%edx c0293c82: 8b 12 mov (%edx),%edx c0293c84: 89 55 f0 mov %edx,-0x10(%ebp) c0293c87: eb 84 jmp 0xc0293c0d c0293c89: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi The rest snipped. >> Jul 29 19:55:36 ini kernel: [ 3044.823044] >> Jul 29 19:55:36 ini kernel: [ 3044.823044] Pid: 1299, comm: umount Not tainted (2.6.32-22-386 #36-Ubuntu) X5DPA >> Jul 29 19:55:36 ini kernel: [ 3044.823044] EIP: 0060:[] EFLAGS: 00010206 CPU: 0 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] EIP is at ext4_put_super+0x2ea/0x350 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] EAX: c2c28ea8 EBX: c307f000 ECX: ffffff52 EDX: c307f138 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] ESI: ca228a00 EDI: c307f0fc EBP: cec6ff30 ESP: cec6fefc >> Jul 29 19:55:36 ini kernel: [ 3044.823044] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] c06bb054 ca228b64 0000800b c2c28ec8 00008180 00000001 00000000 c307f138 >> Jul 29 19:55:36 ini kernel: [ 3044.823044]<0> c307f138 c307f138 ca228a00 c0593c80 c023b310 cec6ff48 c01fc60d ca228ac0 >> Jul 29 19:55:36 ini kernel: [ 3044.823044]<0> cec6ff44 cf328400 00000003 cec6ff58 c01fc6ca ca228a00 c0759d80 cec6ff6c >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? vfs_quota_off+0x0/0x20 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? generic_shutdown_super+0x4d/0xe0 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? kill_block_super+0x2a/0x50 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? deactivate_super+0x64/0x90 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? mntput_no_expire+0x8f/0xe0 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? sys_umount+0x47/0xa0 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? sys_oldumount+0x1e/0x20 >> Jul 29 19:55:36 ini kernel: [ 3044.823044] [] ? syscall_call+0x7/0xb >> Jul 29 19:55:36 ini kernel: [ 3045.299442] ---[ end trace 426db011a0289db3 ]--- > ... >> Another test. Everything is as before, only I did not pull the cable, but >> deleted the corresponding LUN on the target, so all the command starting >> from this moment failed. Then on umount system rebooted. Kernel log: > > Nasty. But the log actually contains only traces of processes in D state > (generally waiting for a page to be unlocked). Do you have any sort of > watchdog which might have rebooted the machine? I didn't configured it ;). This is unmodified Ubuntu server 10.04, only with non-PAE kernel. The reboot wasn't immediate. I even tried to check something in another ssh. Again, you can find more logs attached to the original message. > Thanks for running the test. Thanks for looking at the results! Vlad -- 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/