linux-kernel - Re: stalling IO regression since linux 5.12, through 5.18

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Message-ID: <20220817183335.47a4ao26wjopavo2@quack3>
Date:   Wed, 17 Aug 2022 20:33:35 +0200
From:   Jan Kara <jack@...e.cz>
To:     Chris Murphy <lists@...orremedies.com>
Cc:     Jan Kara <jack@...e.cz>,
        Holger Hoffstätte 
        <holger@...lied-asynchrony.com>,
        Nikolay Borisov <nborisov@...e.com>,
        Jens Axboe <axboe@...nel.dk>,
        Paolo Valente <paolo.valente@...aro.org>,
        Linux-RAID <linux-raid@...r.kernel.org>,
        linux-block <linux-block@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Josef Bacik <josef@...icpanda.com>
Subject: Re: stalling IO regression since linux 5.12, through 5.18

On Wed 17-08-22 14:18:01, Chris Murphy wrote:
> 
> 
> On Wed, Aug 17, 2022, at 2:15 PM, Jan Kara wrote:
> 
> > OK, if this indeed passes then b6e68ee82585 ("blk-mq: Improve performance
> > of non-mq IO schedulers with multiple HW queues") might be what's causing
> > issues (although I don't know how yet...).
> 
> I can revert it from 5.12.0 and try. Let me know which next test is preferred :)

Let's try to revert this first so that we have it narrowed down what
started causing the issues. 

								Honza

-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR