Date: Sat, 11 Aug 2007 15:18:35 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Rong-en Fan <grafan@gmail.com> Cc: current@freebsd.org Subject: Re: panic: sleeping thread owns a non-sleepable lock Message-ID: <20070811191835.GA28716@rot26.obsecurity.org> In-Reply-To: <6eb82e0708111122g7e36b725h19ede889e4bbc9d6@mail.gmail.com> References: <6eb82e0708111122g7e36b725h19ede889e4bbc9d6@mail.gmail.com>
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On Sun, Aug 12, 2007 at 02:22:35AM +0800, Rong-en Fan wrote: > I'm running 7.0-CURRENT as of yesterday, and it's very easy > to make it panic: > > Sleeping thread (tid 100065, pid 1066) owns a non-sleepable lock > sched_switch(c50a1600,0,1,1c7a7e4,4217e5,...) at sched_switch+0x190 > mi_switch(1,0) at mi_switch+0x13f > sleepq_switch(c50a1600,0,c078a4e2,21b,c07e3820,...) at sleepq_switch+0x87 > sleepq_wait(c07e3820,0,c0770b7e,3,0,...) at sleepq_wait+0x36 > _sx_xlock_hard(c07e3820,c50a1600,0,0,0,...) at _sx_xlock_hard+0x21d > fr_checknatout(f9c7a8d0,f9c7a8cc,64,c57ad900,c4de7400,...) at > fr_checknatout+0x29d > fr_check(c8cc4644,14,c4de7400,1,f9c7a9b4,...) at fr_check+0x9b1 > fr_check_wrapper(0,f9c7a9b4,c4de7400,2,c54dab28,...) at fr_check_wrapper+0x3f > pfil_run_hooks(c08057c0,f9c7aa4c,c4de7400,2,c54dab28,...) at pfil_run_hooks+0x74 > ip_output(c8cc4600,0,f9c7aa10,0,0,...) at ip_output+0x913 > tcp_output(cae322d0,cb277200,0,0,0,...) at tcp_output+0x1106 > tcp_usr_send(c51e7318,0,cb277200,0,0,...) at tcp_usr_send+0x240 > kern_sendfile(c50a1600,f9c7acfc,0,0,0,...) at kern_sendfile+0x1037 > sendfile(c50a1600,f9c7acfc,20,16,f9c7ad2c,...) at sendfile+0xa8 > syscall(f9c7ad38) at syscall+0x315 > Xint0x80_syscall() at Xint0x80_syscall+0x20 > --- syscall (393, FreeBSD ELF32, sendfile), eip = 0x28290bff, esp = > 0xbfbfc6ac, ebp = 0xbfbfe718 --- What is the lock it holds, and where is it acquired? kris
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