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Message-Id: <200803212245.13659.rjw@sisk.pl> Date: Fri, 21 Mar 2008 22:45:13 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz> Cc: linux-kernel@...r.kernel.org, Bartlomiej Zolnierkiewicz <bzolnier@...il.com> Subject: Re: APM crashes when IO is going on On Friday, 21 of March 2008, Mikulas Patocka wrote: > > > I found another problem --- present in 2.6.23.1, 2.6.25rc3, 2.6.25rc6 > > > > > > --- when I run three threads concurrently reading raw disk partition and > > > suspend, I get 100% reproducible failure. (with one thread running it > > > usually succeeds, sometimes fail) > > > > Are they userland threads or kernel threads? > > Useland threads. Just dd if=/dev/hda of=/dev/null > > > > Either the on-going I/O will jam BIOS and I need to remove power to > > > continue. > > > > > > Or the machine suspends, wakes up and reports "hda: lost interrupt" > > > (2.6.23.1 was able to recover from this condition, 2.6.25rc3,6 does not > > > recover and it is not able to send any more disk IOs). > > > > > > How is suspending disk IO supposed to work? > > > > That depends on the driver, if I understand your question correctly. > > The driver is normal IDE. Do you mean IDE_GENERIC/BLK_DEV_GENERIC? Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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