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Date: Mon, 19 Feb 2007 16:27:03 -0600 From: Kumar Gala <galak@...nel.crashing.org> To: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> Cc: Linux Kernel list <linux-kernel@...r.kernel.org> Subject: Re: 2.6.20 kernel hang with USB drive and vfat doing ftruncate On Feb 19, 2007, at 4:19 PM, OGAWA Hirofumi wrote: > 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. Yeah, got sysrq working today. If you can point me at the patch I happy to apply it and get data. - k - 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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