linux-kernel - Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with interactive weight raising

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Message-ID: <pan$52e56$32054c2c$65485942$f649b0c5@applied-asynchrony.com>
Date:   Sun, 7 Jan 2018 18:09:47 +0000 (UTC)
From:   Holger Hoffstätte 
        <holger@...lied-asynchrony.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-block@...r.kernel.org
Subject: Re: [PATCH IMPROVEMENT] block, bfq: limit sectors served with
 interactive weight raising

On Thu, 28 Dec 2017 15:00:56 +0100, Holger Hoffstätte wrote:

> On 12/28/17 12:19, Paolo Valente wrote:
> (snip half a tech report ;)
> 
> So either this or the previous patch ("limit tags for writes and async I/O"
> can lead to a hard, unrecoverable hang with heavy writes. Since I couldn't
> log into the affected system anymore I couldn't get any stack traces, blk-mq
> debug output etc. but there was nothing in dmesg/on the console, so it
> wasn't a BUG/OOPS.

So this turned out to be something else, sorry for the false alarm.

-h