linux-kernel - Re: [RFC] mm: prevent set a value less than 0 to min_free

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Message-ID: <alpine.DEB.2.02.1401081825470.15616@chino.kir.corp.google.com>
Date:	Wed, 8 Jan 2014 18:26:24 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Han Pingtian <hanpt@...ux.vnet.ibm.com>
cc:	linux-kernel@...r.kernel.org, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	Michal Hocko <mhocko@...e.cz>,
	Dave Hansen <dave.hansen@...el.com>
Subject: Re: [RFC] mm: prevent set a value less than 0 to min_free_kbytes

On Wed, 8 Jan 2014, Han Pingtian wrote:

> If echo -1 > /proc/vm/sys/min_free_kbytes, the system will hang.
> Changing proc_dointvec() to proc_dointvec_minmax() in the
> min_free_kbytes_sysctl_handler() can prevent this to happen.
> 
> Signed-off-by: Han Pingtian <hanpt@...ux.vnet.ibm.com>

Acked-by: David Rientjes <rientjes@...gle.com>

Nice catch!
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