linux-kernel - Re: dm: Make MIN_IOS, et al, tunable via sysctl.

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Message-ID: <alpine.LRH.2.02.1308201852220.22284@file01.intranet.prod.int.rdu2.redhat.com>
Date:	Tue, 20 Aug 2013 18:52:57 -0400 (EDT)
From:	Mikulas Patocka <mpatocka@...hat.com>
To:	Mike Snitzer <snitzer@...hat.com>
cc:	Frank Mayhar <fmayhar@...gle.com>,
	device-mapper development <dm-devel@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: dm: Make MIN_IOS, et al, tunable via sysctl.



On Tue, 20 Aug 2013, Mike Snitzer wrote:

> Mikulas' point is that you cannot reduce the size to smaller than 1.
> And aside from rq-based DM, 1 is sufficient to allow for forward
> progress even when memory is completely consumed.
> 
> A patch that simply changes them to 1 but makes the rq-based DM
> mempool's size configurable should actually be fine.

Yes, I think it would be viable.

Mikulas

> Mike
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