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SubjectRE: [PATCH V2 RESEND] fsl-sata: I/O load balancing

> -----Original Message-----
> From:
> []
> On Behalf Of Benjamin Herrenschmidt
> Sent: Friday, February 17, 2012 11:19 AM
> To: Li Yang-R58472
> Cc: Liu Qiang-B32616;;;
> Subject: RE: [PATCH V2 RESEND] fsl-sata: I/O load balancing
> On Fri, 2012-02-17 at 03:09 +0000, Li Yang-R58472 wrote:
> > >I tried a debian install on the p5020ds here and I find SATA to be
> > >extremely slow, generating millions of interrupts. I think the
> > defaults
> > >should be a lot more aggressive at coalescing.
> >
> > The P5020 has a hardware problem with SATA, making it generate more
> > interrupts than it should. A new revision of the silicon will fix it.
> Ok cool. With a bit of luck you guys can send me a new silicon when it's
> available then :-) (The one in the board you got me seems to be in a
> socket).
We still do not have the a P5020 sample to fix the problem.
One workaround is to use the patch ( I think you have noticed the patch):

and use a SSD hard drive.
It will have a usable performance.

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