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Date: Fri, 21 Mar 2008 22:17:43 +0100 (CET) From: Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz> To: "Rafael J. Wysocki" <rjw@...k.pl> cc: linux-kernel@...r.kernel.org Subject: Re: APM crashes when IO is going on > > 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. > > And why it doesn't? > > Hard to tell. You didn't provide much information ... > > Thanks, > Rafael Mikulas -- 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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