From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Hirokazu Takahashi <taka@valinux.co.jp>
Cc: linux-mm@kvack.org, iwamoto@valinux.co.jp, haveblue@us.ibm.com,
hugh@veritas.com
Subject: Re: migration cache, updated
Date: Thu, 28 Oct 2004 13:19:28 -0200 [thread overview]
Message-ID: <20041028151928.GA7562@logos.cnet> (raw)
In-Reply-To: <20041027.224837.118287069.taka@valinux.co.jp>
On Wed, Oct 27, 2004 at 10:48:37PM +0900, Hirokazu Takahashi wrote:
> Hi,
>
> > > BTW, I wonder how the migration code avoid to choose some pages
> > > on LRU, which may have count == 0. This may happen the pages
> > > are going to be removed. We have to care about it.
> >
> > AFAICS its already done by __steal_page_from_lru(), which is used
> > by grab_capturing_pages():
> :
> > Pages with reference count zero will be not be moved to the page
> > list, and truncated pages seem to be handled nicely later on the
> > migration codepath.
>
> Ok, I see no problem about this with the current implementation.
>
>
> BTW, now I'm just wondering migration_duplicate() should be
> called from copy_page_range(), since page-migration and fork()
> may work at the same time.
>
> What do you think about this?
Yep thats probably what caused your failures.
I'll prepare a new patch.
--
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next prev parent reply other threads:[~2004-10-28 15:19 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-25 21:39 Marcelo Tosatti
2004-10-26 1:17 ` Hiroyuki KAMEZAWA
2004-10-26 12:01 ` Marcelo Tosatti
2004-10-26 23:47 ` Hiroyuki KAMEZAWA
2004-10-26 6:37 ` Hirokazu Takahashi
2004-10-26 9:20 ` Marcelo Tosatti
2004-10-26 13:45 ` Hirokazu Takahashi
2004-10-26 11:41 ` Marcelo Tosatti
2004-10-27 13:40 ` Hirokazu Takahashi
2004-10-26 9:15 ` Hirokazu Takahashi
2004-10-26 9:25 ` Marcelo Tosatti
2004-10-26 14:01 ` Hirokazu Takahashi
2004-10-26 12:24 ` Marcelo Tosatti
2004-10-27 7:25 ` IWAMOTO Toshihiro
2004-10-27 16:27 ` Marcelo Tosatti
2004-10-27 13:48 ` Hirokazu Takahashi
2004-10-28 15:19 ` Marcelo Tosatti [this message]
2004-10-28 16:05 ` Marcelo Tosatti
2004-10-28 18:51 ` Dave Hansen
2004-10-28 16:26 ` Marcelo Tosatti
2004-10-28 20:24 ` Dave Hansen
2004-11-03 15:21 ` Marcelo Tosatti
2004-11-04 8:01 ` Hirokazu Takahashi
2004-11-05 13:49 ` Hirokazu Takahashi
2004-11-05 15:16 ` Marcelo Tosatti
2004-11-16 4:07 ` Hirokazu Takahashi
2004-11-23 12:14 ` Marcelo Tosatti
2004-11-24 10:21 ` Hirokazu Takahashi
2004-12-01 20:21 ` Marcelo Tosatti
2004-12-08 13:23 ` Hirokazu Takahashi
2005-01-17 9:59 ` Marcelo Tosatti
2005-01-31 18:33 ` Ray Bryant
2005-01-31 18:44 ` Marcelo Tosatti
2005-02-02 21:28 ` Ray Bryant
2005-02-03 2:59 ` Hirokazu Takahashi
2005-02-03 15:19 ` Ray Bryant
2005-02-04 7:32 ` Hirokazu Takahashi
2005-02-04 16:08 ` Ray Bryant
2005-02-07 12:46 ` Hirokazu Takahashi
2005-02-07 20:54 ` Ray Bryant
2005-02-08 2:17 ` Hirokazu Takahashi
[not found] ` <42083913.9050306@sgi.com>
[not found] ` <20050209.151938.63052333.taka@valinux.co.jp>
2005-02-09 20:48 ` Ray Bryant
2005-02-07 13:16 ` Hirokazu Takahashi
2005-02-03 2:49 ` Hirokazu Takahashi
2005-01-03 19:04 page migration Ray Bryant
2005-01-03 19:37 ` Dave Hansen
2005-01-03 20:15 ` Ray Bryant
2005-01-04 14:42 ` Hirokazu Takahashi
2005-01-04 17:30 ` Ray Bryant
2005-01-04 17:40 ` process " Dave Hansen
2005-01-04 18:26 ` Ray Bryant
2005-01-07 16:57 ` migration cache, updated Ray Bryant
2005-01-10 10:07 ` Marcelo Tosatti
2005-01-03 19:25 Ray Bryant
2005-02-06 2:02 Marcelo Tosatti
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