Date: Fri, 26 Oct 2007 20:19:05 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Gleb Kozyrev <gkozyrev@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: Deadlock, exclusive sx so_rcv_sx, amd64 Message-ID: <20071026171905.GD37471@deviant.kiev.zoral.com.ua> In-Reply-To: <ca661e8a0710260252u4f5c1c3di22828143e81e3df2@mail.gmail.com> References: <ca661e8a0710211529y2a48b4a9h78da4211b3f09274@mail.gmail.com> <200710251435.58984.jhb@freebsd.org> <ca661e8a0710260252u4f5c1c3di22828143e81e3df2@mail.gmail.com>
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--AkbCVLjbJ9qUtAXD Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Oct 26, 2007 at 12:52:07PM +0300, Gleb Kozyrev wrote: > 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. > > >=20 > This time the freeze was a matter of minutes. >=20 > 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 > ... >=20 > db> show alllocks > Process 1187 (sshd) thread 0xffffff00065ad350 (100166) > exclusive sx so_rcv_sx r =3D 0 (0xffffff0006534670) locked @ > /usr/src/sys/kern/uipc_sockbuf.c:145 >=20 > 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" >=20 > 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. Lots of the processes in the pfault state suggests that this is, in fact, vm deadlock. I think that alltrace output would be interesting, as well as output of "print cnt" from the kgdb. --AkbCVLjbJ9qUtAXD Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFHIiGJC3+MBN1Mb4gRAjUYAKCSYxPyri0/z8ntMJmdyGOVjnA8awCfbxpU Ox7tW7QVG+Rd3a+TtKRp1nA= =f4Dg -----END PGP SIGNATURE----- --AkbCVLjbJ9qUtAXD--
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