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Date: Mon, 2 Jul 2012 15:54:20 -0500
From: Nathan Zimmer <nzimmer@sgi.com>
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To: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>
CC: Christoph Lameter <cl@linux.com>, Nick Piggin <npiggin@gmail.com>,
        Hugh Dickins <hughd@google.com>,
        Lee Schermerhorn <lee.schermerhorn@hp.com>,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Rik van Riel <riel@redhat.com>
Subject: Re: [PATCH 0/2 v4][rfc] tmpfs not interleaving properly
References: <20120702202635.GA20284@gulag1.americas.sgi.com>
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On 07/02/2012 03:26 PM, Nathan Zimmer wrote:
> When tmpfs has the memory policy interleaved it always starts allocating at each
> file at node 0.  When there are many small files the lower nodes fill up
> disproportionately.
> This patch spreads out node usage by starting files at nodes other then 0.
> The tmpfs superblock grants an offset for each inode as they are created. Each
> then uses that offset to proved a prefered first node for its interleave in
> the shmem_interleave.
>
> v2: passed preferred node via addr
> v3: using current->cpuset_mem_spread_rotor instead of random_node
> v4: Switching the rotor and attempting to provide an interleave function
> Also splitting the patch into two sections.
>
> Cc: Christoph Lameter <cl@linux.com>
> Cc: Nick Piggin <npiggin@gmail.com>
> Cc: Hugh Dickins <hughd@google.com>
> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> Cc: Rik van Riel <riel@redhat.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Signed-off-by: Nathan T Zimmer <nzimmer@sgi.com>
> ---
>
>   include/linux/mm.h       |    6 ++++++
>   include/linux/shmem_fs.h |    2 ++
>   mm/mempolicy.c           |    4 ++++
>   mm/shmem.c               |   33 ++++++++++++++++++++++++++++++---
>   4 files changed, 42 insertions(+), 3 deletions(-)
>
> --
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I apologize, it seems I have sent the patch before running checkpatch.