From: Daniel Palmer <daniel@0x0f.com>
To: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Cc: Laibin Qiu <qiulaibin@huawei.com>,
axboe@kernel.dk,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-block@vger.kernel.org, john.garry@huawei.com,
ming.lei@redhat.com, martin.petersen@oracle.com, hare@suse.de,
Andrew Morton <akpm@linux-foundation.org>,
bvanassche@acm.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: "blk-mq: fix tag_get wait task can't be awakened" causes hangs
Date: Tue, 25 Jan 2022 20:38:09 +0900 [thread overview]
Message-ID: <CAFr9PXk0XxXN4rWhwe_hVc8npXcVc=vb7QEmiwYaydMhXrjquQ@mail.gmail.com> (raw)
In-Reply-To: <1643040870.3bwvk3sis4.none@localhost>
Hi Alex,
Same issue here. I just spent an hour bisecting the issue and hit the
same commit you did.
If I try to dd from a USB card reader to null I can see a few commands
wake up the thread that usb storage uses and then nothing more.
The user process then blocks forever waiting for the data it asked for.
Cheers,
Daniel
prev parent reply other threads:[~2022-01-25 11:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1643040870.3bwvk3sis4.none.ref@localhost>
2022-01-24 16:24 ` "blk-mq: fix tag_get wait task can't be awakened" causes hangs Alex Xu (Hello71)
2022-01-25 4:08 ` QiuLaibin
2022-01-25 15:15 ` Alex Xu (Hello71)
2022-01-26 13:38 ` Jens Axboe
2022-01-27 1:24 ` QiuLaibin
2022-01-25 11:38 ` Daniel Palmer [this message]
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