linux-kernel - Re: [PATCH] mm/page-writeback.c: fix divide by zero in bdi_dirty

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Message-ID: <53BFF995.5020602@redhat.com>
Date:	Fri, 11 Jul 2014 10:49:57 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Maxim Patlasov <MPatlasov@...allels.com>, akpm@...ux-foundation.org
CC:	linux-kernel@...r.kernel.org, mhocko@...e.cz, linux-mm@...ck.org,
	kosaki.motohiro@...fujitsu.com, fengguang.wu@...el.com,
	jweiner@...hat.com
Subject: Re: [PATCH] mm/page-writeback.c: fix divide by zero in bdi_dirty_limits

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On 07/11/2014 04:18 AM, Maxim Patlasov wrote:
> Under memory pressure, it is possible for dirty_thresh, calculated
> by global_dirty_limits() in balance_dirty_pages(), to equal zero.
> Then, if strictlimit is true, bdi_dirty_limits() tries to resolve
> the proportion:
> 
> bdi_bg_thresh : bdi_thresh = background_thresh : dirty_thresh
> 
> by dividing by zero.
> 
> Signed-off-by: Maxim Patlasov <mpatlasov@...allels.com>

Acked-by: Rik van Riel <riel@...hat.com>

- -- 
All rights reversed
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