Date: Sun, 10 Jan 2010 08:24:47 GMT From: Alt <wtfcrap@mail.ru> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/142563: ioctl freeze in zpool Message-ID: <201001100824.o0A8Ol14036072@www.freebsd.org> Resent-Message-ID: <201001100830.o0A8U4gu072642@freefall.freebsd.org>
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>Number: 142563 >Category: kern >Synopsis: ioctl freeze in zpool >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Jan 10 08:30:04 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Alt >Release: 9-CURRENT >Organization: >Environment: FreeBSD 9.0-CURRENT FreeBSD 9.0-CURRENT #0 r201894: Sun Jan 10 01:53:08 MSK 2010 root@:/usr/obj/root/current/sys/GENERIC i386 >Description: zfs's zpool utility freezes on ioctl call on rare situtions: # zpool status Jan 10 10:16:33 root: ZFS: vdev failure, zpool=test type=vdev.bad_label Jan 10 10:16:33 root: ZFS: vdev failure, zpool=test type=vdev.bad_label Issue leads to zfs pools become uncontrollable, since zpool's commands status,import,export,destroy not working now. I tried to trackdown issue - it leads to kernel ioctl call (i dont have any experience with kernel dev): (gdb) disas Dump of assembler code for function ioctl: 0x2828a740 <ioctl+0>: mov $0x36,%eax 0x2828a745 <ioctl+5>: int $0x80 0x2828a747 <ioctl+7>: jb 0x2828a72c <select+12> 0x2828a749 <ioctl+9>: ret 0x2828a74a <ioctl+10>: nop 0x2828a74b <ioctl+11>: nop 0x2828a74c <ioctl+12>: push %ebx 0x2828a74d <ioctl+13>: call 0x2828a752 <ioctl+18> 0x2828a752 <ioctl+18>: pop %ebx 0x2828a753 <ioctl+19>: add $0x15b36,%ebx 0x2828a759 <ioctl+25>: jmp 0x2817fc14 <_init+3940> 0x2828a75e <ioctl+30>: mov %esi,%esi End of assembler dump. (gdb) stepi 0x2828a745 3 RSYSCALL(ioctl) (gdb) Jan 10 10:16:33 root: ZFS: vdev failure, zpool=test type=vdev.bad_label Jan 10 10:16:33 root: ZFS: vdev failure, zpool=test type=vdev.bad_label (now its freezed and dont react ctrl-c, sigterm, sigkill - any signals) >How-To-Repeat: Make zfs raidz1 with 4+ disks. Shutdown system. Replace 1 disk with new one and remove other. So, we removed 2 disks from pool and its broken. Boot and command `zpool status` - it freezes. Need to say it take effect with other commands: import/export/destroy, so actually pools become uncontrollable.. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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