From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nigel J. Terry" Subject: Re: Raid5 reshape Date: Sun, 18 Jun 2006 08:57:27 -0400 Message-ID: <44954DB7.2000305@nigelterry.net> References: <449250ED.7090302@irule.net> <17554.21119.487820.638171@cse.unsw.edu.au> <4492D5B1.60004@nigelterry.net> <4492D8D9.7010101@irule.net> <17555.12441.42212.93049@cse.unsw.edu.au> <4493330E.30501@nigelterry.net> <17555.13409.834439.80361@cse.unsw.edu.au> <44945643.3070300@nigelterry.net> <17556.31295.280083.533342@cse.unsw.edu.au> <44947BCA.9040305@nigelterry.net> <44947C98.6060809@nigelterry.net> <17556.32630.611922.294047@cse.unsw.edu.au> <44948002.3050706@nigelterry.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <44948002.3050706@nigelterry.net> Sender: linux-raid-owner@vger.kernel.org To: Neil Brown , linux-raid@vger.kernel.org List-Id: linux-raid.ids Nigel J. Terry wrote: > Neil Brown wrote: >> OK, thanks for the extra details. I'll have a look and see what I can >> find, but it'll probably be a couple of days before I have anything >> useful for you. >> >> NeilBrown >> - >> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> > This from dmesg might help diagnose the problem: md: Autodetecting RAID arrays. md: autorun ... md: considering sdb1 ... md: adding sdb1 ... md: adding sda1 ... md: adding hdc1 ... md: adding hdb1 ... md: created md0 md: bind md: bind md: bind md: bind md: running: raid5: automatically using best checksumming function: generic_sse generic_sse: 6795.000 MB/sec raid5: using function: generic_sse (6795.000 MB/sec) md: raid5 personality registered for level 5 md: raid4 personality registered for level 4 raid5: reshape will continue raid5: device sdb1 operational as raid disk 1 raid5: device sda1 operational as raid disk 0 raid5: device hdb1 operational as raid disk 2 raid5: allocated 4268kB for md0 raid5: raid level 5 set md0 active with 3 out of 4 devices, algorithm 2 RAID5 conf printout: --- rd:4 wd:3 fd:1 disk 0, o:1, dev:sda1 disk 1, o:1, dev:sdb1 disk 2, o:1, dev:hdb1 ...ok start reshape thread md: syncing RAID array md0 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reconstruction. md: using 128k window, over a total of 245111552 blocks. Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: <0000000000000000>{stext+2145382632} PGD 7c3f9067 PUD 7cb9e067 PMD 0 Oops: 0010 [1] SMP CPU 0 Modules linked in: raid5 xor usb_storage video button battery ac lp parport_pc parport floppy nvram snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss ehci_hcd ohci1394 ieee1394 sg snd_pcm uhci_hcd i2c_nforce2 i2c_core forcedeth ohci_hcd snd_timer snd soundcore snd_page_alloc dm_snapshot dm_zero dm_mirror dm_mod ext3 jbd sata_nv libata sd_mod scsi_mod Pid: 1432, comm: md0_reshape Not tainted 2.6.17-rc6 #1 RIP: 0010:[<0000000000000000>] <0000000000000000>{stext+2145382632} RSP: 0000:ffff81007aa43d60 EFLAGS: 00010246 RAX: ffff81007cf72f20 RBX: ffff81007c682000 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff81007cf72f20 RBP: 0000000002090900 R08: 0000000000000000 R09: ffff810037f497b0 R10: 0000000b44ffd564 R11: ffffffff8022c92a R12: 0000000000000000 R13: 0000000000000100 R14: 0000000000000000 R15: 0000000000000000 FS: 000000000066d870(0000) GS:ffffffff80611000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 0000000000000000 CR3: 000000007bebc000 CR4: 00000000000006e0 Process md0_reshape (pid: 1432, threadinfo ffff81007aa42000, task ffff810037f497b0) Stack: ffffffff803dce42 0000000000000000 000000001d383600 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Call Trace: {md_do_sync+1307} {thread_return+0} {thread_return+94} {keventd_create_kthread+0} {md_thread+248} {keventd_create_kthread+0} {md_thread+0} {kthread+254} {child_rip+8} {keventd_create_kthread+0} {thread_return+0} {kthread+0} {child_rip+0} Code: Bad RIP value. RIP <0000000000000000>{stext+2145382632} RSP CR2: 0000000000000000 <6>md: ... autorun DONE.