linux-kernel - Re: [PATCH 0/3] writeback: kernel visibility

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Message-ID: <4C6DAC15.7040004@redhat.com>
Date:	Thu, 19 Aug 2010 18:11:33 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Michael Rubin <mrubin@...gle.com>
CC:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, jack@...e.cz, akpm@...ux-foundation.org,
	david@...morbit.com, npiggin@...e.de, hch@....de, axboe@...nel.dk
Subject: Re: [PATCH 0/3] writeback: kernel visibility

On 08/19/2010 04:57 PM, Michael Rubin wrote:
> Patch #1 sets up some helper functions for accounting.
>
> Patch #2 adds writeback visibility in /proc/sys/vm.
>
> To help developers and applications gain visibility into writeback
> behaviour adding two read-only sysctl files into /proc/sys/vm.
> These files allow user apps to understand writeback behaviour over time
> and learn how it is impacting their performance.
>
>   # cat /proc/sys/vm/pages_dirtied
>   3747
>   # cat /proc/sys/vm/pages_entered_writeback
>   3618

Would it be better to have these values in /proc/vmstat
and /proc/zoneinfo ?

I don't really see why they need to be in /proc/sys
at all...

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