linux-kernel - Re: [BUG] mm/page-writeback.c: divide by zero in pos_ratio

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Message-ID: <20141101083012.54d3b59b@gandalf.local.home>
Date:	Sat, 1 Nov 2014 08:30:12 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, Michal Hocko <mhocko@...e.cz>,
	linux-mm@...ck.org, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [BUG] mm/page-writeback.c: divide by zero in pos_ratio_polynom
 not fixed

On Sat, 1 Nov 2014 08:23:25 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> I don't see how d5c9fde3dae75
> could have fixed anything.

I take that back. It fixes the case on 64 bit systems where the
parameter of div_u64() truncates it. But it does nothing to help the
situation on 32 bit systems.

-- Steve
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