linux-kernel - Re: [PATCH] mm: Save soft-dirty bits on file pages

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Message-ID: <20130729150209.GO2524@moon>
Date:	Mon, 29 Jul 2013 19:02:09 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	Pavel Emelyanov <xemul@...allels.com>,
	Linux MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andy Lutomirski <luto@...capital.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matt Mackall <mpm@...enic.com>,
	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH] mm: Save soft-dirty bits on file pages

On Mon, Jul 29, 2013 at 08:28:54PM +0530, Aneesh Kumar K.V wrote:
> >
> > If only I'm not missing something obvious, this code compiles not only on x86,
> > CONFIG_MEM_SOFT_DIRTY depends on x86 (otherwise I'll have to implement
> > pte_soft_dirty for all archs).
> 
> why not
> 
> #ifndef pte_soft_dirty 
> #define pte_soft_dirty(pte) 0 
> #endif
> 
> and on x86 
> #define pte_soft_dirty pte_soft_dirty

Yeah, either this way, either to use asm-generic (later I think
more preferred), thanks!
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