Hi all, I am seeing an occassional kernel panic when running "mdadm -S /dev/md0" to stop a RAID 5 array that is syncing. The /var/log/messages snip-it is below. My system is a VMware Ubuntu 10.04 (Lucid) 64-bit VM, with mdadm 3.1.4 instead of the stock version in Ubuntu. I have no additional mdadm nor kernel patches. I have 11 virtual hard drives in my VM, and I am using 9 as active drives and 2 as spares. Chunk size is 64K. The issue is tough to duplicate but if I create the md array, and then mdadm -S it, and then recreate it again, and do this sequence in rapid succession, I can sometimes make this kernel panic happen. Dec 18 14:08:33 localhost kernel: [ 1077.948456] mdadm D 0000000000000000 0 12873 12872 0x00000000 Dec 18 14:08:33 localhost kernel: [ 1077.948463] ffff880052201a68 0000000000000082 0000000000015bc0 0000000000015bc0 Dec 18 14:08:33 localhost kernel: [ 1077.948469] ffff8800418a1a98 ffff880052201fd8 0000000000015bc0 ffff8800418a16e0 Dec 18 14:08:33 localhost kernel: [ 1077.948473] 0000000000015bc0 ffff880052201fd8 0000000000015bc0 ffff8800418a1a98 Dec 18 14:08:33 localhost kernel: [ 1077.948478] Call Trace: Dec 18 14:08:33 localhost kernel: [ 1077.948504] [<ffffffff81558a7d>] schedule_timeout+0x22d/0x300 Dec 18 14:08:33 localhost kernel: [ 1077.948510] [<ffffffff81557d26>] wait_for_common+0xd6/0x180 Dec 18 14:08:33 localhost kernel: [ 1077.948518] [<ffffffff8115c3c8>] ? ifind_fast+0x58/0xb0 Dec 18 14:08:33 localhost kernel: [ 1077.948529] [<ffffffff81059a60>] ? default_wake_function+0x0/0x20 Dec 18 14:08:33 localhost kernel: [ 1077.948542] [<ffffffff811ae899>] ? sysfs_drop_dentry+0x139/0x160 Dec 18 14:08:33 localhost kernel: [ 1077.948548] [<ffffffff81557e8d>] wait_for_completion+0x1d/0x20 Dec 18 14:08:33 localhost kernel: [ 1077.948553] [<ffffffff811af3b8>] sysfs_addrm_finish+0x118/0x150 Dec 18 14:08:33 localhost kernel: [ 1077.948578] [<ffffffff811accbb>] sysfs_hash_and_remove+0x5b/0x80 Dec 18 14:08:33 localhost kernel: [ 1077.948583] [<ffffffff811b0c8f>] sysfs_remove_group+0x5f/0x100 Dec 18 14:08:33 localhost kernel: [ 1077.948596] [<ffffffffa0425c31>] stop+0x61/0x80 [raid456] Dec 18 14:08:33 localhost kernel: [ 1077.948607] [<ffffffff8142cabd>] do_md_stop+0xdd/0x560 Dec 18 14:08:33 localhost kernel: [ 1077.948620] [<ffffffff81284b51>] ? apparmor_capable+0x31/0xa0 Dec 18 14:08:33 localhost kernel: [ 1077.948626] [<ffffffff8142f694>] md_ioctl+0x514/0x7f0 Dec 18 14:08:33 localhost kernel: [ 1077.948630] [<ffffffff81059a72>] ? default_wake_function+0x12/0x20 Dec 18 14:08:33 localhost kernel: [ 1077.948636] [<ffffffff810f34be>] ? find_get_page+0x1e/0xa0 Dec 18 14:08:33 localhost kernel: [ 1077.948640] [<ffffffff810f4ecb>] ? filemap_fault+0x8b/0x450 Dec 18 14:08:33 localhost kernel: [ 1077.948646] [<ffffffff8113cb5d>] ? mem_cgroup_update_mapped_file_stat+0x2d/0x90 Dec 18 14:08:33 localhost kernel: [ 1077.948652] [<ffffffff812a56b7>] __blkdev_driver_ioctl+0x27/0x80 Dec 18 14:08:33 localhost kernel: [ 1077.948656] [<ffffffff812a5b8d>] blkdev_ioctl+0x1ed/0x6f0 Dec 18 14:08:33 localhost kernel: [ 1077.948661] [<ffffffff81172ffc>] block_ioctl+0x3c/0x40 Dec 18 14:08:33 localhost kernel: [ 1077.948667] [<ffffffff81153d42>] vfs_ioctl+0x22/0xa0 Dec 18 14:08:33 localhost kernel: [ 1077.948671] [<ffffffff81153ee1>] do_vfs_ioctl+0x81/0x410 Dec 18 14:08:33 localhost kernel: [ 1077.948676] [<ffffffff8155d273>] ? do_page_fault+0x153/0x3b0 Dec 18 14:08:33 localhost kernel: [ 1077.948680] [<ffffffff811542f1>] sys_ioctl+0x81/0xa0 Dec 18 14:08:33 localhost kernel: [ 1077.948687] [<ffffffff810121b2>] system_call_fastpath+0x16/0x1b Thank you in advance for any guidance! -Tommy -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
