Hi Dan,
We don't need caching, can we turn it off?
Thanks.
-----Original Message-----
From: Dan Malek [mailto:dan at mvista.com]
Sent: Tuesday, September 26, 2000 8:55 AM
To: Julia Elbert
Cc: 'linuxppc-embedded at lists.linuxppc.org'
Subject: Re: switching linux kernels
Julia Elbert wrote:
> I am switching to HardHat 2.2.13 from ppc
2.2.13.
> .....whatsoever, just the data is corrupted some how.
Depending upon the flavor of the day ppc 2.2.13, it could be
a cache
configuration difference. The old 2.2.13 kernels often had
the data
cache in the write-through mode to avoid a variety of bugs
in both
hardware and software.
The HHLinux 2.2.13 (and all later kernels) run with
copy-back data
cache and subsequent silicon errata fixes, so there may be a
cache
coherency hole in the way your driver manages it's space.
-- Dan
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** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
