Date: Sun, 21 Jan 2001 09:25:29 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: John Baldwin <jhb@FreeBSD.org> Cc: Mark Murray <mark@grondar.za>, current@FreeBSD.org, The Hermit Hacker <scrappy@hub.org> Subject: Re: current hangs... Message-ID: <7757.980065529@critter> In-Reply-To: Your message of "Sat, 20 Jan 2001 16:03:08 PST." <XFMail.010120160308.jhb@FreeBSD.org>
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In message <XFMail.010120160308.jhb@FreeBSD.org>, John Baldwin writes: > >On 20-Jan-01 Poul-Henning Kamp wrote: >> In message <XFMail.010120145554.jhb@FreeBSD.org>, John Baldwin writes: >>> >>>On 20-Jan-01 The Hermit Hacker wrote: >>>> On Sat, 20 Jan 2001, Mark Murray wrote: >>>> >>>>> > >>>>> > on a 2xPII/350, 256M, two scsi disks on ahc, and ccd I have three times >>>>> > now hung the machine so that only reset got any attention simply by >>>>> > make -j 128 world >>>>> >>>>> Do you have an easy way to narrow it down to CCD by doing the same >>>>> thing but without ccd involvement? >>>> >>>> I don't have CCD, and got home last night from the office and mine was >>>> hung also, on a kernel from the day before ... being in X, pretty much >>>> nothing I could do to try and debug it ... new laptop gets in this week, >>>> so will be setting up the whole serial console debugging env ... >>> >>>Is it SMP, and does it have multiple SCSI disks hanging off of the same >>>device? >> >> SMP, one scsi disk on each controller, /usr and /home ccd'ed. > >Is there any code dealing with disk I/O in the kernel that does the equivalent >of this: > >while (!io_done) > /* spin */ ; > >That assumes an interrupt will set io_done? > >Using DELAY() in places might explain this. Not that I know of. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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