From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
To: Rik van Riel <riel@redhat.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Minchan Kim <minchan@kernel.org>,
John Stultz <john.stultz@linaro.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>, Mel Gorman <mgorman@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Anton Vorontsov <anton.vorontsov@linaro.org>,
Pekka Enberg <penberg@kernel.org>,
Wu Fengguang <fengguang.wu@intel.com>,
Hugh Dickins <hughd@google.com>
Subject: Re: RFC: Easy-Reclaimable LRU list
Date: Sun, 24 Jun 2012 07:09:30 -0400 [thread overview]
Message-ID: <CAHGf_=rqTnmm-kTBZQs8NwOX2yKh=fxJ58-uPcL6cb7K3tk9Og@mail.gmail.com> (raw)
In-Reply-To: <4FE5E66C.6080309@redhat.com>
On Sat, Jun 23, 2012 at 11:53 AM, Rik van Riel <riel@redhat.com> wrote:
> On 06/23/2012 12:45 AM, Kamezawa Hiroyuki wrote:
>
>> I think this is interesting approach. Major concern is how to guarantee
>> EReclaimable
>> pages are really EReclaimable...Do you have any idea ? madviced pages
>> are really EReclaimable ?
>
> I suspect the EReclaimable pages can only be clean page
> cache pages that are not mapped by any processes.
>
> Once somebody tries to use the page, mark_page_accessed
> will move it to another list.
100% agree.
>> A (very) small concern is will you use one more page-flags for this ? ;)
>
> This could be an issue on a 32 bit system, true.
Do we really need SwapBacked bit? Actually swap-backed is
per-superblock attribute and don't change dynamically (i.e. no race
happen). thus this bit
might be able to move into page->mapping or page->mapping->host.
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next prev parent reply other threads:[~2012-06-24 11:09 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-19 5:49 Minchan Kim
2012-06-21 19:21 ` John Stultz
2012-06-22 6:57 ` Minchan Kim
2012-06-23 4:45 ` Kamezawa Hiroyuki
2012-06-23 15:53 ` Rik van Riel
2012-06-24 11:09 ` KOSAKI Motohiro [this message]
2012-06-25 0:15 ` Minchan Kim
2012-06-25 8:46 ` Glauber Costa
2012-06-26 0:12 ` Minchan Kim
2012-06-26 8:07 ` Glauber Costa
2012-06-25 10:24 ` Mel Gorman
2012-06-26 0:26 ` Minchan Kim
2012-07-17 16:03 ` Zheng Liu
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