From owner-freebsd-stable@FreeBSD.ORG Tue Jun 16 15:09:16 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0050F106564A; Tue, 16 Jun 2009 15:09:15 +0000 (UTC) (envelope-from avg@freebsd.org) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id E30B88FC0A; Tue, 16 Jun 2009 15:09:11 +0000 (UTC) (envelope-from avg@freebsd.org) Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua [212.40.38.101]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id SAA09400; Tue, 16 Jun 2009 18:09:10 +0300 (EEST) (envelope-from avg@freebsd.org) Message-ID: <4A37B596.4090607@freebsd.org> Date: Tue, 16 Jun 2009 18:09:10 +0300 From: Andriy Gapon User-Agent: Thunderbird 2.0.0.21 (X11/20090406) MIME-Version: 1.0 To: Kip Macy References: <4A325E9F.2080802@icyb.net.ua> <3c1674c90906121354s6d6ae7ben5082708b1586e94f@mail.gmail.com> <4A37B395.20506@icyb.net.ua> In-Reply-To: <4A37B395.20506@icyb.net.ua> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org Subject: Re: zfs related panic X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jun 2009 15:09:16 -0000 on 16/06/2009 18:00 Andriy Gapon said the following: > on 12/06/2009 23:54 Kip Macy said the following: >> show sleepchain > > I can only do post-mortem using jhb's scripts for kgdb: > (kgdb) sleepchain 2432 > thread 100263 (pid 2432, tcsh) non-lock sleep I think that this was reported because td_wchan is not 'struct lock' in this case. (kgdb) fr 6 #6 0xffffffff802fc567 in kern_sigsuspend (td=Variable "td" is not available. ) at /usr/src/sys/kern/kern_sig.c:1474 (kgdb) list 1469 td->td_oldsigmask = td->td_sigmask; 1470 td->td_pflags |= TDP_OLDMASK; 1471 SIG_CANTMASK(mask); 1472 td->td_sigmask = mask; 1473 signotify(td); 1474 while (msleep(&p->p_sigacts, &p->p_mtx, PPAUSE|PCATCH, "pause", 0) == 0) 1475 /* void */; 1476 PROC_UNLOCK(p); 1477 /* always return EINTR rather than ERESTART... */ 1478 return (EINTR); (kgdb) p &p->p_sigacts $10 = (struct sigacts **) 0xffffff011440e548 (kgdb) fr 0 #0 sched_switch (td=0xffffff000cfad720, newtd=Variable "newtd" is not available. ) at /usr/src/sys/kern/sched_ule.c:1944 (kgdb) p td->td_wchan $11 = (void *) 0xffffff011440e548 (kgdb) p td->td_wmesg $12 = 0xffffffff80508788 "pause" (kgdb) backtrace #0 sched_switch (td=0xffffff000cfad720, newtd=Variable "newtd" is not available. ) at /usr/src/sys/kern/sched_ule.c:1944 #1 0xffffffff80302a59 in mi_switch (flags=1, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:444 #2 0xffffffff8032f645 in sleepq_switch (wchan=Variable "wchan" is not available. ) at /usr/src/sys/kern/subr_sleepqueue.c:497 #3 0xffffffff8032f925 in sleepq_catch_signals (wchan=0xffffff011440e548) at /usr/src/sys/kern/subr_sleepqueue.c:417 #4 0xffffffff80330219 in sleepq_wait_sig (wchan=Variable "wchan" is not available. ) at /usr/src/sys/kern/subr_sleepqueue.c:594 #5 0xffffffff80302eba in _sleep (ident=0xffffff011440e548, lock=0xffffff011440e5a0, priority=360, wmesg=0xffffffff80508788 "pause", timo=0) at /usr/src/sys/kern/kern_synch.c:228 #6 0xffffffff802fc567 in kern_sigsuspend (td=Variable "td" is not available. ) at /usr/src/sys/kern/kern_sig.c:1474 #7 0xffffffff802fc5e9 in sigsuspend (td=0xffffff000cfad720, uap=Variable "uap" is not available. ) at /usr/src/sys/kern/kern_sig.c:1453 #8 0xffffffff80491d2d in syscall (frame=0xffffff8076db8c80) at /usr/src/sys/amd64/amd64/trap.c:899 #9 0xffffffff8047d00b in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:339 #10 0x000000080092ce3c in ?? () -- Andriy Gapon