Re: SSD slowdown with 3.3.X?

[Mark Lord <kernel@xxxxxxxxxxxx>]

On 12-04-18 10:15 PM, Joe Ceklosky wrote:
> All,
> 
> Has anyone reported slowness using SSD's on kernel 3.3.X compiled
> as 32-bit PAE with 16 Gigs of memory (I know I need to update to 64-bit
> already, will do with Fedora 17)?
> 
> I am see terrible r/w to an SSD using 3.3.2.  When I boot the same machine
> and SSD back in 3.2.15 all is fine.


Double check which IO-scheduler the kernel is choosing.
For SSDs, it is normally "noop", but I noticed "cfq"
being chosen instead for some reason.

   find /sys -name scheduler|grep '/sd[a-z]/'|xargs cat

-ml
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