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

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Message-ID: <m1wr9283i4.fsf@fess.ebiederm.org>
Date:	Sun, 08 Jan 2012 10:15:31 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Greg KH <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

Greg KH <gregkh@...e.de> writes:

> 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.

Eric
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