linux-kernel - Re: [RFC PATCH v4 2/2] hung_task: Display every hung task warning

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Message-ID: <alpine.DEB.2.02.1401212124110.13234@chino.kir.corp.google.com>
Date:	Tue, 21 Jan 2014 21:24:46 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	atomlin@...hat.com
cc:	linux-kernel@...r.kernel.org, mingo@...nel.org, oleg@...hat.com,
	riel@...hat.com, akpm@...ux-foundation.org
Subject: Re: [RFC PATCH v4 2/2] hung_task: Display every hung task warning

On Mon, 20 Jan 2014, atomlin@...hat.com wrote:

> From: Aaron Tomlin <atomlin@...hat.com>
> 
> When khungtaskd detects hung tasks, it prints out
> backtraces from a number of those tasks.
> Limiting the number of backtraces being printed
> out can result in the user not seeing the information
> necessary to debug the issue. The hung_task_warnings
> sysctl controls this feature.
> 
> This patch makes it possible for hung_task_warnings
> to accept a special value to print an unlimited
> number of backtraces when khungtaskd detects hung
> tasks.
> 
> The special value is -1. To use this value it is
> necessary to change types from ulong to int.
> 
> Signed-off-by: Aaron Tomlin <atomlin@...hat.com>
> Reviewed-by: Rik van Riel <riel@...hat.com>

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

Nice documentation updates!
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