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Date: Thu, 25 Nov 2021 13:11:36 -0800 (PST) From: "Kenneth R. Crudup" <kenny@...ix.com> To: Jens Axboe <axboe@...nel.dk> cc: linux-bcache@...r.kernel.org, linux-block@...r.kernel.org, linux-ext4@...r.kernel.org, linux-nvme@...ts.infradead.org Subject: Re: Write I/O queue hangup at random on recent Linus' kernels On Thu, 25 Nov 2021, Jens Axboe wrote: >>> echo 0 > /sys/block/nvme0n1/queue/wbt_lat_usec >> It's been about 48 hours and haven't seen the issue since doing this. > Great, thanks for verifying. From your report 5.16-rc2 has the issue, is > 5.15 fine? I can check that out sometime in the next few days, but IIRC I pretty sure the issue hadn't surfaced before the 3rd or 4th of November. I pull from master at least every 2-3 days, so there's at least a timeframe. -Kenny -- Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA
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