From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?BERTRAND_Jo=EBl?= Date: Thu, 12 Jul 2007 07:17:04 +0000 Subject: Re: [sparc64] Strange interaction between 2.6 kernel and 2.5 (and Message-Id: <4695D570.200@systella.fr> List-Id: References: <46933AE8.1080509@systella.fr> In-Reply-To: <46933AE8.1080509@systella.fr> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: sparclinux@vger.kernel.org David Miller wrote: > From: BERTRAND_Jo=EBl > Date: Wed, 11 Jul 2007 12:24:07 +0200 >=20 >> Root rayleigh:[/etc/mail] > ps -eLf | grep clamd >> clamav 3502 1 3502 1 2 10:53 ? 00:01:23 /usr/sbin/cla= md >> clamav 3502 1 7226 0 2 12:00 ? 00:00:00 /usr/sbin/cla= md >> root 8091 5893 8091 0 1 12:18 pts/0 00:00:00 grep clamd >> >> clamd remains in S mode. >> >> I have tried to obtain mode information with sysrq+w without any=20 >> success, sysrq+w returns no blocked task. In this example, clamd is=20 >> blocked, but some other tasks can be blocked. >=20 > This is not enough information to debug this problem, sorry. >=20 > You'll need to do some thinking about what kind of other information > you can fetch from this stuck process. Perhaps running > clamd under strace will provide a good debugging trace so we can > see exactly what kind of socket it is stuck on, and in what way. OK. Now, I run clamd under strace. I hope that it will quickly hang ;-)=20 When,clamd hangs, I will post here its strace output. Are there=20 significative differences between futex management on sbus and pci=20 sparc64 ? I have tried to reproduce this bug on sbus workstation without=20 any success, but I can see it on all sparc64/PCI I have (U60, U80, U420)... Regards, JKB