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Message-ID: <87ejolkcyt.fsf@duaron.myhome.or.jp> Date: Tue, 20 Feb 2007 07:19:06 +0900 From: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> To: Kumar Gala <galak@...nel.crashing.org> Cc: Linux Kernel list <linux-kernel@...r.kernel.org> Subject: Re: 2.6.20 kernel hang with USB drive and vfat doing ftruncate Kumar Gala <galak@...nel.crashing.org> writes: >>> I usually run the following twice to get the hang state: >>> >>> time ./trunc_test bar 100000000 & >>> time ./trunc_test baz 100000000 & >>> >>> I was wondering if anyone had any suggestions on what to poke at next >>> to try and figure out what is going on. >> >> Can you check /sys/block/xxx/stat or something to make sure there is >> no outstanding IO request? >> >> It seems to be no response from the lower layer... > > Once the system locks up I dont have any ability to do anything. Ah, doesn't sysrq also work? If sysrq work, it can use to see IO request state with a patch. -- OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> - 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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