linux-kernel - Re: [PATCH] sysctl: vfs_cache

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Message-Id: <20070321160132.983812ac.randy.dunlap@oracle.com>
Date:	Wed, 21 Mar 2007 16:01:32 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"J.H." <warthog9@...nel.org>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sysctl: vfs_cache_divisor

On Mon, 19 Mar 2007 21:22:33 -0700 H. Peter Anvin wrote:

> Randy Dunlap wrote:
> >>
> >> The we duplicate all the relevant /proc knobs:
> >>
> >> cat /proc/sys/vm/dirty_ratio
> >> 30
> >> cat /proc/sys/vm/hires-dirty_ratio/
> >> 300000
> >>
> >> Or we do something else ;)
> > 
> > Sounds better.  I wasn't very keen on the userspace interface that this
> > exposed.  Will look at those.
> > 
> 
> Okay... may be I could throw a spanner in the machinery, and suggest 
> another option: perhaps we should add a way to do sysctl which can 
> handle fractional (fixed-point) values... more coherent/detailed message 
> tomorrow.

I prefer the fixed-point values for pressure and dirty* to having
duplicated entries for each of them.  I'll proceed with that idea.


---
~Randy
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