From: Rik van Riel <riel@redhat.com>
To: Shaohua Li <shli@kernel.org>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hughd@google.com,
minchan@kernel.org
Subject: Re: [patch 2/3 v2]swap: make each swap partition have one address_space
Date: Tue, 22 Jan 2013 14:49:04 -0500 [thread overview]
Message-ID: <50FEED30.5090709@redhat.com> (raw)
In-Reply-To: <20130122022951.GB12293@kernel.org>
On 01/21/2013 09:29 PM, Shaohua Li wrote:
>
> When I use several fast SSD to do swap, swapper_space.tree_lock is heavily
> contended. This makes each swap partition have one address_space to reduce the
> lock contention. There is an array of address_space for swap. The swap entry
> type is the index to the array.
>
> In my test with 3 SSD, this increases the swapout throughput 20%.
>
> V1->V2: simplify code
>
> Signed-off-by: Shaohua Li <shli@fusionio.com>
Acked-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2013-01-22 19:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-22 2:29 [patch 2/3 v2]swap: make each swap partition have one address_space Shaohua Li
2013-01-22 19:49 ` Rik van Riel [this message]
2013-01-23 6:16 ` Minchan Kim
2013-01-23 7:36 ` Shaohua Li
2013-01-23 8:04 ` Minchan Kim
2013-01-24 1:39 ` Simon Jeons
2013-01-24 2:22 ` Minchan Kim
2013-01-24 2:43 ` Shaohua Li
2013-01-24 3:25 ` Simon Jeons
2013-01-24 10:35 ` Shaohua Li
2013-01-24 5:19 ` Minchan Kim
2013-01-24 6:14 ` Simon Jeons
2013-01-24 10:24 ` Shaohua Li
2013-01-31 21:50 ` Andrew Morton
2013-01-31 23:29 ` Minchan Kim
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