From: Andrew Morton <akpm@linux-foundation.org>
To: paul.szabo@sydney.edu.au
Cc: linux-mm@kvack.org, 695182@bugs.debian.org,
linux-kernel@vger.kernel.org,
Wu Fengguang <fengguang.wu@intel.com>
Subject: Re: [PATCH] MAX_PAUSE to be at least 4
Date: Tue, 22 Jan 2013 16:04:36 -0800 [thread overview]
Message-ID: <20130122160436.f0fa8352.akpm@linux-foundation.org> (raw)
In-Reply-To: <201301210307.r0L37YuG018834@como.maths.usyd.edu.au>
On Mon, 21 Jan 2013 14:07:34 +1100
paul.szabo@sydney.edu.au wrote:
> Ensure MAX_PAUSE is 4 or larger, so limits in
> return clamp_val(t, 4, MAX_PAUSE);
> (the only use of it) are not back-to-front.
MAX_PAUSE is not used in this fashion in current kernels.
> (This patch does not solve the PAE OOM issue.)
>
> Paul Szabo psz@maths.usyd.edu.au http://www.maths.usyd.edu.au/u/psz/
> School of Mathematics and Statistics University of Sydney Australia
>
> Reported-by: Paul Szabo <psz@maths.usyd.edu.au>
> Reference: http://bugs.debian.org/695182
> Signed-off-by: Paul Szabo <psz@maths.usyd.edu.au>
>
> --- mm/page-writeback.c.old 2012-12-06 22:20:40.000000000 +1100
> +++ mm/page-writeback.c 2013-01-21 13:57:05.000000000 +1100
> @@ -39,7 +39,7 @@
> /*
> * Sleep at most 200ms at a time in balance_dirty_pages().
> */
> -#define MAX_PAUSE max(HZ/5, 1)
> +#define MAX_PAUSE max(HZ/5, 4)
>
> /*
> * Estimate write bandwidth at 200ms intervals.
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prev parent reply other threads:[~2013-01-23 0:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-21 3:07 paul.szabo
2013-01-23 0:01 ` Jan Kara
2013-01-23 0:04 ` Andrew Morton [this message]
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