Re: SSD slowdown with 3.3.X?

[Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>]

On 4/21/2012 6:45 AM, cwillu wrote:
>> Probably not relevant in this case but maybe worth mentioning to get the
>> word out:
>>
>> "As of kernel 3.2.12, the default i/o scheduler, CFQ, will defeat much
>> of the parallelization in XFS."
>>
>> http://www.xfs.org/index.php/XFS_FAQ
> 
> Not that it's terribly relevant to btrfs, but do you have a better
> citation for that than a very recent one-line wiki change that only
> cites the user's own anecdote?

Apologies for the rather weak citation.  It was simply easier to quote
that wiki entry.

How about something directly from Dave's fingers:
http://www.spinics.net/lists/xfs/msg10824.html

The many issues with CFQ+XFS didn't start with 3.2.12, but long before that.

-- 
Stan
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