linux-kernel - Re: WARNING: CPU: 3 PID: 1 at block/blk-mq-cpumap.c:90 blk_mq_map_hw

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Message-ID: <20250122175817.3eac488f@gandalf.local.home>
Date: Wed, 22 Jan 2025 17:58:17 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Daniel Wagner <dwagner@...e.de>
Cc: Christoph Hellwig <hch@....de>, LKML <linux-kernel@...r.kernel.org>,
 Linus Torvalds <torvalds@...ux-foundation.org>, Daniel Wagner
 <wagi@...nel.org>, Hannes Reinecke <hare@...e.de>, Ming Lei
 <ming.lei@...hat.com>, John Garry <john.g.garry@...cle.com>, Jens Axboe
 <axboe@...nel.dk>
Subject: Re: WARNING: CPU: 3 PID: 1 at block/blk-mq-cpumap.c:90
 blk_mq_map_hw_queues+0xf3/0x100

On Wed, 22 Jan 2025 12:54:45 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> Not sure its related. I can see how reproducible this is, and if it is, I
> can try to bisect it.

I bisected it down to: a5665c3d150c98 ("virtio: blk/scsi: replace
blk_mq_virtio_map_queues with blk_mq_map_hw_queues")

And reverting that as well as:

  9bc1e897a821f ("blk-mq: remove unused queue mapping helpers")

It booted fine.

-- Steve