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

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Message-ID: <m1sjjwggz0.fsf@fess.ebiederm.org>
Date:	Tue, 03 Jan 2012 21:43:47 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Greg Kroah-Hartman <gregkh@...e.de>
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

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?

Eric
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