Date: Sun, 13 Oct 2002 00:12:43 -0400 (EDT) From: Jeff Roberson <jroberson@chesapeake.net> To: Kris Kennaway <kris@obsecurity.org> Cc: current@FreeBSD.ORG Subject: Re: current unable to exec processes under load Message-ID: <20021013001013.N30714-100000@mail.chesapeake.net> In-Reply-To: <20021012213213.GC93425@xor.obsecurity.org>
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On Sat, 12 Oct 2002, Kris Kennaway wrote: > I'm having a strange problem with my -current box: I am running the > bfbtester port on system utilities, which basically forks 100 copies > of the binary at once to test different options. The problem is that > sometimes the -current system becomes unable to fork *any* new > processes, and even suspending or trying to kill the bfbtester process > does not work. The rest of the system performance is fine (I can use > existing processes with no noticeable CPU latency): so it does not > appear to be a resource starvation condition. > > rot13# ls > [hangs] > load: 0.00 cmd: csh 22888 [vmmapw] 0.00u 0.00s 0% 1160k > > This process now cannot be interrupted by signals. > > => /usr/sbin/sendmail > * Single argument testing > ^Z > Suspended > [hang] > load: 0.00 cmd: tcsh 8403 [inode] 0.01u 0.00s 0% 1076k > > Any ideas? Can you back out my scheduler changes just to be sure? I can not foresee any way that they could cause this, but I'd like to be certain. Blocking on inode usually indicates a vfs deadlock. Can you break into ddb and type 'show lockedvnods' and paste me that output? Thanks! Jeff To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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