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Date: Thu, 25 Nov 2021 13:05:16 -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, "Kenneth R. Crudup" <kenny@...ix.com> Subject: Re: Write I/O queue hangup at random on recent Linus' kernels On Tue, 23 Nov 2021, Jens Axboe wrote: > It looks like some missed accounting. You can just disable wbt for now, would > be a useful data point to see if that fixes it. Just do: > echo 0 > /sys/block/nvme0n1/queue/wbt_lat_usec > and that will disable writeback throttling on that device. It's been about 48 hours and haven't seen the issue since doing this. -Kenny -- Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA
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