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Date: Sun, 25 Mar 2012 11:55:52 +0400
From: Konstantin Khlebnikov <khlebnikov@...nvz.org>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC: Minchan Kim <minchan@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Hugh Dickins <hughd@...gle.com>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
"linux@....linux.org.uk" <linux@....linux.org.uk>
Subject: Re: [PATCH 00/16] mm: prepare for converting vm->vm_flags to 64-bit
Benjamin Herrenschmidt wrote:
> On Sat, 2012-03-24 at 18:46 +0400, Konstantin Khlebnikov wrote:
>> Obviously we can combine VM_PFN_AT_MMAP, VM_SAO, VM_GROWSUP and
>> VM_MAPPED_COPY into one.
>
> VM_PFN_AT_MMAP isn't arch specific afaik...
Technically yes, but all this pfnmap-tracking engine has only one user: x86 PAT.
We can easily make it x86-only, or try to implement it without using special flag on vma.
>
> Cheers,
> Ben.
>
>
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