From: Bob Breuer <breuerr@mc.net>
To: sparclinux@vger.kernel.org
Subject: Re: vmalloc can clobber framebuffer on sparc32
Date: Tue, 13 Jun 2006 16:09:34 +0000 [thread overview]
Message-ID: <448EE33E.3060500@mc.net> (raw)
In-Reply-To: <448D0D0D.8080606@mc.net>
Mark Fortescue wrote:
> Hi,
>
> Why don't you just move the VMALLOC area to say FC000000. I did this on my
> sparc32 system to alow me to debug some PROM Console/CG3 issues. I did not
> observe any failures/anomalies with this and is gets around any problems
> with the PROM memory mapping of frame buffers.
Sounds like a good idea, but SRMMU_NOCACHE occupies FC000000, and then
highmem mappings (PKMAP_BASE) are after that. However, if the nocache
and highmem mappings are not used on sun4c, we may be able to move them
below F0000000.
> It also has the advantage of alowing you to increase the size of the
> VMALLOC area should this be required.
>
> Ideally, the area should be dynamically allocated based on the required
> size and the PROM allocations on boot but this may be somewhat
> impractical in real life.
>
> Regards
> Mark Fortescue.
>
next prev parent reply other threads:[~2006-06-13 16:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-12 6:43 vmalloc can clobber framebuffer on sparc32 Bob Breuer
2006-06-13 6:54 ` David Miller
2006-06-13 9:23 ` Mark Fortescue
2006-06-13 16:09 ` Bob Breuer [this message]
2006-07-07 23:38 ` David Miller
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