linux-kernel - Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections

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Message-ID: <1280622451.1902.33.camel@pasglop>
Date:	Sun, 01 Aug 2010 10:27:31 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Greg KH <greg@...ah.com>
Cc:	Nathan Fontenot <nfont@...tin.ibm.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linuxppc-dev@...abs.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory
 sections

On Sat, 2010-07-31 at 12:55 -0700, Greg KH wrote:
> On Sat, Jul 31, 2010 at 03:36:24PM +1000, Benjamin Herrenschmidt wrote:
> > On Mon, 2010-07-19 at 22:45 -0500, Nathan Fontenot wrote:
> > > This set of patches de-couples the idea that there is a single
> > > directory in sysfs for each memory section.  The intent of the
> > > patches is to reduce the number of sysfs directories created to
> > > resolve a boot-time performance issue.  On very large systems
> > > boot time are getting very long (as seen on powerpc hardware)
> > > due to the enormous number of sysfs directories being created.
> > > On a system with 1 TB of memory we create ~63,000 directories.
> > > For even larger systems boot times are being measured in hours.
> > 
> > Greg, Kame, how do we proceed with these ? I'm happy to put them in
> > powerpc.git with appropriate acks or will you take them ?
> 
> I thought there would be at least one more round of these patches based
> on the review comments, right?

Yes, but I was nontheless inquiring whether I should pick them up after
said repost :-)

> I'll be glad to take them when everyone agrees with them.

Ok, good, one less thing to worry about in powerpc patchwork :-)

Cheers,
Ben.

> thanks,
> 
> greg k-h


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