linux-kernel - Re: [GIT PULL] Ext3 latency fixes

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Date:	Sun, 05 Apr 2009 13:15:11 -0400
From:	Mark Lord <lkml@....ca>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...radead.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [GIT PULL] Ext3 latency fixes

Linus Torvalds wrote:
>
> Non-rotational media would tend to want the unplugging, but the block 
> layer already does that (ie in __make_request() we already do:
> 
>         if (unplug || blk_queue_nonrot(q))
>                 __generic_unplug_device(q);
> 
> so non-rotational devices get unplugged whether the request was a 
> unplugging request or not).
..

Mmm.. except that Jeff's SSD doesn't appear to identify itself
as a non-rotating media.  I suppose there's a way to "quirk" that
somewhere, though.

:/
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