Re: [patch 2/2] mspec driver

From: Jes Sorensen <jes_at_sgi.com>
Date: 2006-03-18 01:11:48
Nick Piggin wrote:
> Jes Sorensen wrote:
>> We don't want COW here as the access is backed by special behavior in
>> the memory controller. We only allow shared mappings for that reason.
>>
> No problem, I think you should just stop using the VM_PFNMAP flag then.
> [Linus should jump in here if I'm wrong ;)]

I'd have to go back and find the discussion to verify, but if I
remember correctly the conclusion was that I needed to use it in
order to make sure that vm_normal_page() didn't start thinking it was
in fact a real page, ie. VM_PFNMAP + never a COW mapping..

Chers,
Jes


-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Received on Sat Mar 18 01:12:52 2006

This archive was generated by hypermail 2.1.8 : 2006-03-18 01:13:00 EST