From: Rik van Riel <riel@redhat.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Andrew Morton <akpm@linux-foundation.org>,
Lee Schermerhorn <lee.schermerhorn@hp.com>,
Nick Piggin <npiggin@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] splitlru: BDI_CAP_SWAP_BACKED
Date: Mon, 30 Jun 2008 15:49:12 -0400 [thread overview]
Message-ID: <20080630154912.15f03b97@bree.surriel.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0806302020260.27080@blonde.site>
On Mon, 30 Jun 2008 20:23:54 +0100 (BST)
Hugh Dickins <hugh@veritas.com> wrote:
> On Mon, 30 Jun 2008, KAMEZAWA Hiroyuki wrote:
> >
> > Hmm, how about adding LRU only for shmem/tmpfs ? nonsense ? ;)
>
> I'd much prefer not: the more LRUs, the more balancing problems;
> And I don't think shmem/tmpfs _deserves_ its own LRUs.
> But it cannot be ruled out.
Tmpfs is often in the same boat as anonymous memory.
Used for shared memory segments, or for files that
are temporary and will be gone soon.
If swap space runs out, tmpfs pages should not be
scanned.
To me, this suggests they should probably continue
to live on the *_ANON LRUs. Worst case we make
tmpfs pages in files that are not mmaped (/tmp use)
start out on the inactive list, so they get evicted
first.
--
All rights reversed.
next prev parent reply other threads:[~2008-06-30 19:50 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-29 0:20 [PATCH] splitlru: shmem_getpage SetPageSwapBacked sooner Hugh Dickins
2008-06-29 0:22 ` [PATCH] splitlru: memcg swapbacked pages active Hugh Dickins
2008-06-29 8:19 ` KOSAKI Motohiro
2008-06-29 12:20 ` Hugh Dickins
2008-06-29 12:58 ` KOSAKI Motohiro
2008-06-29 13:51 ` Hugh Dickins
2008-06-30 2:44 ` KAMEZAWA Hiroyuki
2008-06-30 19:19 ` Hugh Dickins
2008-06-30 8:36 ` [RFC][PATCH] memcg: change shmem handler KAMEZAWA Hiroyuki
2008-06-30 19:52 ` Hugh Dickins
2008-07-01 0:56 ` kamezawa.hiroyu
2008-07-02 2:16 ` [RFC][PATCH] memcg: shmem swap cache KAMEZAWA Hiroyuki
2008-07-01 1:06 ` Re: Re: [RFC][PATCH] memcg: change shmem handler kamezawa.hiroyu
2008-07-03 7:15 ` Balbir Singh
2008-07-03 7:56 ` KAMEZAWA Hiroyuki
2008-06-29 0:24 ` [PATCH] splitlru: BDI_CAP_SWAP_BACKED Hugh Dickins
2008-06-29 8:48 ` KOSAKI Motohiro
2008-06-29 15:16 ` Rik van Riel
2008-06-30 2:53 ` KAMEZAWA Hiroyuki
2008-06-30 19:23 ` Hugh Dickins
2008-06-30 19:49 ` Rik van Riel [this message]
2008-06-30 20:55 ` Hugh Dickins
2008-06-30 21:17 ` Rik van Riel
2008-06-29 8:09 ` [PATCH] splitlru: shmem_getpage SetPageSwapBacked sooner KOSAKI Motohiro
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