Date: Mon, 30 Jul 2001 09:28:06 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: current@FreeBSD.org Subject: RE: -current lockups Message-ID: <XFMail.010730092806.jhb@FreeBSD.org> In-Reply-To: <20010729190011.B810@xor.obsecurity.org>
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On 30-Jul-01 Kris Kennaway wrote: > Hi all, > > For the past 2 or 3 weeks my -current system has been experiencing > temporary lockups, usually under disk load. The entire system will > hang for around 20-30 seconds, during which time absolutely no > network/IO/keyboard/mouse activity is accepted. Usually, after 20-30 > seconds the system will unwedge and activity will resume, but > sometimes it hangs forever. There are no console messages logged by > this event. I cannot break into DDB until after system activity > resumes normally. > > My system is a PPro 233 using IDE drives. Has anyone else seen > something like this? I see this on my laptop sometimes, always accompanied by heavy disk I/O during the entire interval. Since disk interrupts are higher priority than TTY interrupts right now (no disk drivers use the PI_DISKLOW priority, partially because there is no mechanism for them to do so right now) if a continual stream of disk interrupts keeps the disk driver ithread busy, we will starve TTY ithreads such as the one for keyboard and mouse. > Kris -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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