Messages in this thread | | | Date | Thu, 27 Jan 2022 09:24:03 +0800 | Subject | Re: "blk-mq: fix tag_get wait task can't be awakened" causes hangs | From | QiuLaibin <> |
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Hi
On 2022/1/26 21:38, Jens Axboe wrote: > On 1/24/22 9:08 PM, QiuLaibin wrote: >> Hi Alex >> >> 1、Please help to import this structure: >> >> blk_mq_tags <= request_queue->blk_mq_hw_ctx->blk_mq_tags >> >> If there is no kernel dump, help to see the value of >> >> cat /sys/block/sda/mq/0/nr_tags >> __ <= Change it to the problem device >> >> And how many block devices in total by lsblk. >> >> 2、Please describe in detail how to reproduce the issue, >> >> And what type of USB device? >> >> 3、Please help to try the attachment patch and see if it can be reproduced. > > Any progress on this? I strongly suspect that any QD=1 setup would > trivially show the issue, based on the reports. Yes, QD = 1 from Alex Xu's must-see environment. I'm trying to build a must-see locally, and I will submit the repaired patch as soon as possible.
>
BR Laibin
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