Date: Sat, 5 Sep 2020 11:26:41 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Graham Perrin <grahamperrin@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org>, Matthew Macy <mmacy@freebsd.org>, Ryan Moeller <freqlabs@FreeBSD.org> Subject: Re: suspend/resume versus OpenZFS on USB Message-ID: <7cd8c682-0c4b-c332-c6de-d17dccbd9672@selasky.org> In-Reply-To: <24c4f60d-d937-7763-9cea-697de75109a6@gmail.com> References: <a0cfead4-bcce-f4ff-662d-a186b19c7a37@gmail.com> <6824e9f5-0496-a9ba-9cf2-01a6c8b34a4e@selasky.org> <24c4f60d-d937-7763-9cea-697de75109a6@gmail.com>
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On 2020-09-05 11:00, Graham Perrin wrote: > On 04/09/2020 09:01, Hans Petter Selasky wrote: >> On 2020-09-04 01:42, Graham Perrin wrote: >>> This week for the first time I toyed with OpenZFS on a USB device: a >>> mobile hard disk drive connected to the dock of an HP EliteBook 8570p. >>> >>> A light test, with the pool imported but not writing to the dataset >>> at suspend time. >>> >>> At resume time (22:31), the device was still physically connected but >>> the pool suffered an I/O failure (and the keyboard and trackball on >>> USB were unusable). > … >> We need output from "procstat -akk" to see where ZFS/USB is hanging. >> >> --HPS > > For test purposes I reproduced the behaviour with a different device, a > USB flash drive (connected to the same dock). > > Attached: > > 2020-09-05 09:27:55 procstat -akk.txt > > – output from procstat -akk > > 2020-09-05 09:17:59 suspend 09:26:49 resume.txt > > – the output in context. > > Thank you > > Graham > > Hi, USB is not hanging. It looks like a problem with USB resume, that no devices are recognized, until you re-plug them ... --HPS
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