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From: Greg KH <gregkh@suse.de>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: linux-kernel@vger.kernel.org, Tejun Heo <tj@kernel.org>,
	Mikulas Patocka <mpatocka@redhat.com>
Subject: Re: [PATCH 0/4] sysfs:  Reduce the size of sysfs_dirent
Date: Sun, 8 Jan 2012 09:56:45 -0800	[thread overview]
Message-ID: <20120108175645.GC29499@suse.de> (raw)
In-Reply-To: <m1sjjwggz0.fsf@fess.ebiederm.org>

On Tue, Jan 03, 2012 at 09:43:47PM -0800, Eric W. Biederman wrote:
> ebiederm@xmission.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

  reply	other threads:[~2012-01-08 17:57 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-19  4:03 Eric W. Biederman
2011-12-19  4:05 ` [PATCH 1/4] sysfs: Add s_hash to sysfs_dirent and order directory entries by hash Eric W. Biederman
2011-12-19  4:07   ` [PATCH 2/4] sysfs: Reduce s_flags to an unsinged short so it packs well with s_mode Eric W. Biederman
2011-12-19  4:08     ` [PATCH 3/4] sysfs: Store the sysfs inode in an unsigned int Eric W. Biederman
2011-12-19  4:09       ` [PATCH 4/4] sysfs: Kill nlink counting Eric W. Biederman
2012-01-04  5:43 ` [PATCH 0/4] sysfs: Reduce the size of sysfs_dirent Eric W. Biederman
2012-01-08 17:56   ` Greg KH [this message]
2012-01-08 18:15     ` Eric W. Biederman

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