Re: SSD slowdown with 3.3.X?

[Mark Lord <kernel@xxxxxxxxxxxx>]

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

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