linux-kernel - Re: [PATCH 0/4] sysfs: Reduce the size of sysfs

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Date:	Sun, 8 Jan 2012 09:56:45 -0800
From:	Greg KH <gregkh@...e.de>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	Mikulas Patocka <mpatocka@...hat.com>
Subject: Re: [PATCH 0/4] sysfs:  Reduce the size of sysfs_dirent

On Tue, Jan 03, 2012 at 09:43:47PM -0800, Eric W. Biederman wrote:
> ebiederm@...ssion.com (Eric W. Biederman) writes:
> 
> > After throwing rb_trees at the problem sysfs_dirent increased in size by
> > 6 pointers, or 48 bytes.    Since the point of having struct
> > sysfs_dirent is to keep the size down increasing in size that much seems
> > unfortunate.
> >
> > The following patches attack this problem and if I have counted right
> > reduce the size of sysfs_dirent by 4 pointers on 64bit.  Not quite
> > where we were but reducing sysfs_dirent by 32bytes to 104 bytes is
> > an improvement.
> 
> Greg did you see these patches for reducing the sysfs memory size
> regression in 3.2?

Ok, due to the holidays, these ended up missing the 3.3 merge window,
I'll queue them up for 3.4.

thanks,

greg k-h
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