linux-kernel - Re: [PATCH] add some drop_caches documentation and info messsge

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Message-ID: <20121024224817.GB8828@liondog.tnic>
Date:	Thu, 25 Oct 2012 00:48:17 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>, linux-mm@...ck.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] add some drop_caches documentation and info messsge

On Wed, Oct 24, 2012 at 02:18:38PM -0700, Dave Hansen wrote:
> Sounds fairly valid to me. But, it's also one that would not be harmed
> or disrupted in any way because of a single additional printk() during
> each suspend-to-disk operation.

Btw,

back to the drop_caches patch. How about we hide the drop_caches
interface behind some mm debugging option in "Kernel Hacking"? Assuming
we don't need it otherwise on production kernels. Probably make it
depend on CONFIG_DEBUG_VM like CONFIG_DEBUG_VM_RB or so.

And then also add it to /proc/vmstat, in addition.

-- 
Regards/Gruss,
    Boris.
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