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List:       linux-arm-kernel
Subject:    Re: [CFT] Mark IO as bufferable
From:       Richard Purdie <rpurdie () rpsys ! net>
Date:       2005-06-27 22:37:04
Message-ID: 1119911824.7522.107.camel () localhost ! localdomain
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On Mon, 2005-06-27 at 17:37 +0100, Russell King - ARM Linux wrote:
> Can people please test out the effect of this change.  Potentially it
> should get slightly better IO performance.  Or it could prevent the
> kernel booting.
> 
> Please let me know what CPUs it works / does not work with, and
> also the outcome of the write buffer test on a kernel without this
> patch applied.  IOW, the line starting:
> 
> 	CPU: Testing write buffer coherency
> 
> Thanks.

The patch stops the PXA255 from booting. I never see anything after
Uncompressing Linux...

A working kernel gives:

CPU: XScale-PXA255 [69052d06] revision 6 (ARMv5TE)
CPU: Testing write buffer coherency: ok

Richard


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