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 1/2]swap: make each swap partition have one address_space
Date: Thu, 13 Dec 2012 13:17:57 -0500 [thread overview]
Message-ID: <50CA1BD5.4070901@redhat.com> (raw)
In-Reply-To: <20121210012439.GA18570@kernel.org>
On 12/09/2012 08:24 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%.
>
> There are some code here which looks unnecessary, for example, moving some code
> from swapops.h to swap.h and soem changes in audit_tree.c. Those are to make
> the code compile.
>
> Signed-off-by: Shaohua Li <shli@fusionio.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2012-12-13 18:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-10 1:24 [patch 1/2]swap: make each swap partition have one address_space Shaohua Li
2012-12-13 18:17 ` Rik van Riel [this message]
2013-01-17 23:18 ` Andrew Morton
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