linux-kernel - Re: [PATCH 00/69] faster tree-based sysctl implementation

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Date:	Mon, 02 May 2011 12:02:55 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Lucian Adrian Grijincu <lucian.grijincu@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Alexey Dobriyan <adobriyan@...il.com>,
	Octavian Purdila <tavi@...pub.ro>,
	"David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH 00/69] faster tree-based sysctl implementation

Lucian Adrian Grijincu <lucian.grijincu@...il.com> writes:

> On Mon, May 2, 2011 at 5:06 AM, Eric W. Biederman <ebiederm@...ssion.com> wrote:
>> In particular I was referring to create_proc_entry.  It takes
>> a path and an optional parent directory.
>
> I did something like that in this patch series I sent a month ago
> which was mostly ignored (except for a call from David Miller for
> feedback on the patches):
> http://thread.gmane.org/gmane.linux.kernel/1121889
>
> I'll see how I can add the optional parent directory in this patch series.
>
> Could you please take a look at a few patches in the above series?
>
> The ones that have "cookie:" add a cookie pointer to the
> ctl_table_header making it possible to skip duplicating ctl_table
> arrays in a few places in the kernel. After finishing this series I'll
> send one with the cookie..

The cookie changes seem particularly intrusive, and if I read your
patches properly the cookies are only useful for table sharing when
implementing network namespaces.  At first glance those changes seem
pretty horrible.

Do you also have a lot of network namespaces in the workloads you care
about?

Eric

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