From: Mark Lord <kernel@teksavvy.com>
To: Joe Ceklosky <jfceklosky@gmail.com>,
"linux-ide@vger.kernel.org >> IDE/ATA development list"
<linux-ide@vger.kernel.org>
Subject: Re: SSD slowdown with 3.3.X?
Date: Fri, 20 Apr 2012 22:40:24 -0400 [thread overview]
Message-ID: <4F921E18.6000301@teksavvy.com> (raw)
In-Reply-To: <4F90C4CF.1010000@gmail.com>
On 12-04-19 10:07 PM, Joe Ceklosky wrote:
> Mark,
>
>
> Thanks for the info, but nothing like that shows up:
>
>
> [jceklosk@neptune tmp]$ cat c-3.2.15
> noop deadline [cfq]
> noop deadline [cfq]
>
>
> [jceklosk@neptune tmp]$ cat c-3.3.2
> noop deadline [cfq]
> noop deadline [cfq]
Well, the stuff you posted (above) shows that cfq is being used
instead of noop. For SSDs, noop is the more natural choice,
and used to be the default in the kernel for a while.
I wonder when that changed?
You can change it (after boot) by just echo'ing "noop" into
those same sysfs entries.
Cheers
next prev parent reply other threads:[~2012-04-21 2:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-19 2:15 SSD slowdown with 3.3.X? Joe Ceklosky
2012-04-19 3:13 ` Mark Lord
2012-04-20 15:23 ` Jeff Moyer
[not found] ` <4F90C4CF.1010000@gmail.com>
2012-04-21 2:40 ` Mark Lord [this message]
2012-04-21 2:43 ` Mark Lord
2012-04-21 3:53 ` Stan Hoeppner
2012-04-21 11:45 ` cwillu
2012-04-21 18:30 ` Stan Hoeppner
2012-04-23 12:44 ` Mark Lord
2012-04-25 0:22 ` Stan Hoeppner
2012-04-23 14:11 ` Jeff Moyer
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