Date: Fri, 26 Oct 2007 12:52:07 +0300 From: "Gleb Kozyrev" <gkozyrev@gmail.com> To: "John Baldwin" <jhb@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Deadlock, exclusive sx so_rcv_sx, amd64 Message-ID: <ca661e8a0710260252u4f5c1c3di22828143e81e3df2@mail.gmail.com> In-Reply-To: <200710251435.58984.jhb@freebsd.org> References: <ca661e8a0710211529y2a48b4a9h78da4211b3f09274@mail.gmail.com> <200710251435.58984.jhb@freebsd.org>
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On 25/10/2007, John Baldwin <jhb@freebsd.org> wrote: > > Running rtorrent and ftp brings my system to a deadlock > > in a few hours. Kernel still responds to pings and sends some > > TCP acks. ... > > Please suggest any other commands to run in DDB if needed. > > Cores are saved. > > show sleepchain <pid> will show if it's a real deadlock or not. > This time the freeze was a matter of minutes. db> ps pid ppid pgrp uid state wmesg wchan cmd 1229 991 991 0 ? smbd 1201 1195 1201 1001 SL+ pfault 0xffffffff80b1359c rtorrent 1199 1193 1199 1001 Ss+ ttyin 0xffffff0001211410 tcsh 1197 1193 1197 1001 Ss+ ttyin 0xffffff0001218810 tcsh 1195 1193 1195 1001 Ss+ pause 0xffffff000624a0c0 tcsh 1193 1192 1193 1001 SLs pfault 0xffffffff80b1359c screen 1192 1190 1190 1001 S+ pause 0xffffff00013c10c0 screen 1190 1189 1190 1001 Ss+ pause 0xffffff00065b40c0 tcsh 1189 1187 1187 1001 S select 0xffffffff80af79d0 sshd 1187 1097 1187 0 Ss sbwait 0xffffff00065346cc sshd ... db> show alllocks Process 1187 (sshd) thread 0xffffff00065ad350 (100166) exclusive sx so_rcv_sx r = 0 (0xffffff0006534670) locked @ /usr/src/sys/kern/uipc_sockbuf.c:145 db> show sleepchain 1187 thread 100166 (pid 1187, sshd) sleeping on 0xffffff00065346cc "sbwait" db> show sleepchain 1201 thread 100164 (pid 1201, rtorrent) sleeping on 0xffffffff80b1359c "pfault" Nothing interesting I guess... Maybe this is not a deadlock, what else can cause such a freeze? I won't reboot it for a while -- maybe someone can suggest anything else. -- With best regards, Gleb Kozyrev.
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