linux-kernel - Re: [PATCH] writeback: guard against jiffies wraparound on inode->dirtied

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Message-ID: <20090401221224.GW11935@one.firstfloor.org>
Date:	Thu, 2 Apr 2009 00:12:24 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jeff Layton <jlayton@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	fengguang.wu@...el.com
Subject: Re: [PATCH] writeback: guard against jiffies wraparound on inode->dirtied_when checks (try #3)

On Wed, Apr 01, 2009 at 05:26:30PM -0400, Jeff Layton wrote:
> One possibility might be a new debugging option. We could add
> replacement time_after() and time_before() macros that also check
> whether the difference in times is beyond a certain threshold
> (maybe a day or week or so), and pop a printk or otherwise record
> info about it when one is detected?

Makes sense. However it might be hard to get people to run kernels
with heavy debugging options for that long.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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