From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Pavel Emelyanov <xemul@parallels.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Matt Mackall <mpm@selenic.com>,
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: [PATCH] mm: Save soft-dirty bits on swapped pages
Date: Wed, 24 Jul 2013 23:18:56 +0400 [thread overview]
Message-ID: <20130724191856.GA27992@moon> (raw)
In-Reply-To: <20130724190453.GJ8508@moon>
On Wed, Jul 24, 2013 at 11:04:53PM +0400, Cyrill Gorcunov wrote:
> On Wed, Jul 24, 2013 at 10:55:41PM +0400, Pavel Emelyanov wrote:
> > >
> > > Well, some part of information already lays in pte (such as 'file' bit,
> > > swap entries) so it looks natural i think to work on this level. but
> > > letme think if use page struct for that be more convenient...
> >
> > It hardly will be. Consider we have a page shared between two tasks,
> > then first one "touches" it and soft-dirty is put onto his PTE and,
> > subsequently, the page itself. The we go and clear sofr-dirty for the
> > 2nd task. What should we do with the soft-dirty bit on the page?
>
> Indeed, this won't help. Well then, bippidy-boppidy-boo, our
> pants are metaphorically on fire (c)
(i meant page flags wont help)
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WARNING: multiple messages have this Message-ID (diff)
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Pavel Emelyanov <xemul@parallels.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Matt Mackall <mpm@selenic.com>,
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: [PATCH] mm: Save soft-dirty bits on swapped pages
Date: Wed, 24 Jul 2013 23:18:56 +0400 [thread overview]
Message-ID: <20130724191856.GA27992@moon> (raw)
In-Reply-To: <20130724190453.GJ8508@moon>
On Wed, Jul 24, 2013 at 11:04:53PM +0400, Cyrill Gorcunov wrote:
> On Wed, Jul 24, 2013 at 10:55:41PM +0400, Pavel Emelyanov wrote:
> > >
> > > Well, some part of information already lays in pte (such as 'file' bit,
> > > swap entries) so it looks natural i think to work on this level. but
> > > letme think if use page struct for that be more convenient...
> >
> > It hardly will be. Consider we have a page shared between two tasks,
> > then first one "touches" it and soft-dirty is put onto his PTE and,
> > subsequently, the page itself. The we go and clear sofr-dirty for the
> > 2nd task. What should we do with the soft-dirty bit on the page?
>
> Indeed, this won't help. Well then, bippidy-boppidy-boo, our
> pants are metaphorically on fire (c)
(i meant page flags wont help)
next prev parent reply other threads:[~2013-07-24 19:18 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-24 16:08 [PATCH] mm: Save soft-dirty bits on swapped pages Cyrill Gorcunov
2013-07-24 16:08 ` Cyrill Gorcunov
2013-07-24 16:23 ` Andy Lutomirski
2013-07-24 16:23 ` Andy Lutomirski
2013-07-24 16:37 ` Cyrill Gorcunov
2013-07-24 16:37 ` Cyrill Gorcunov
2013-07-24 17:06 ` Andy Lutomirski
2013-07-24 17:06 ` Andy Lutomirski
2013-07-24 17:17 ` Cyrill Gorcunov
2013-07-24 17:17 ` Cyrill Gorcunov
2013-07-24 17:36 ` James Bottomley
2013-07-24 17:36 ` James Bottomley
2013-07-24 17:42 ` Andy Lutomirski
2013-07-24 17:42 ` Andy Lutomirski
2013-07-24 18:15 ` Cyrill Gorcunov
2013-07-24 18:15 ` Cyrill Gorcunov
2013-07-24 18:21 ` Andy Lutomirski
2013-07-24 18:21 ` Andy Lutomirski
2013-07-24 18:52 ` Cyrill Gorcunov
2013-07-24 18:52 ` Cyrill Gorcunov
2013-07-24 18:55 ` Pavel Emelyanov
2013-07-24 18:55 ` Pavel Emelyanov
2013-07-24 19:04 ` Cyrill Gorcunov
2013-07-24 19:04 ` Cyrill Gorcunov
2013-07-24 19:18 ` Cyrill Gorcunov [this message]
2013-07-24 19:18 ` Cyrill Gorcunov
2013-07-24 19:40 ` Andy Lutomirski
2013-07-24 19:40 ` Andy Lutomirski
2013-07-25 7:07 ` Cyrill Gorcunov
2013-07-25 7:07 ` Cyrill Gorcunov
2013-07-25 7:29 ` Pavel Emelyanov
2013-07-25 7:29 ` Pavel Emelyanov
2013-07-25 8:26 ` Hush Bensen
2013-07-25 8:26 ` Hush Bensen
2013-07-25 8:43 ` Pavel Emelyanov
2013-07-25 8:43 ` Pavel Emelyanov
2013-07-25 16:02 ` Andy Lutomirski
2013-07-25 16:02 ` Andy Lutomirski
2013-07-24 18:52 ` Pavel Emelyanov
2013-07-24 18:52 ` Pavel Emelyanov
2013-07-24 18:52 ` Pavel Emelyanov
2013-07-24 18:52 ` Pavel Emelyanov
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