linux-kernel - Re: 2.6.29 -mm merge plans

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Message-Id: <200901071306.45210.nickpiggin@yahoo.com.au>
Date:	Wed, 7 Jan 2009 13:06:44 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org,
	Keika Kobayashi <kobayashi.kk@...s.nec.co.jp>
Subject: Re: 2.6.29 -mm merge plans

On Wednesday 07 January 2009 10:13:44 Andrew Morton wrote:
> (cc added)
>
> On Tue, 6 Jan 2009 17:57:44 -0500
>
> Christoph Hellwig <hch@...radead.org> wrote:
> > On Mon, Jan 05, 2009 at 12:43:00AM -0800, Andrew Morton wrote:
> > > softirq-introduce-statistics-for-softirq.patch
> > > proc-export-statistics-for-softirq-to-proc.patch
> > > proc-update-document-for-proc-softirqs-and-proc-stat.patch
> >
> > Why is this in procfs?
>
> softirq stuff in /proc seems appropriate?  It's alongside
> /proc/interrupts.  We could put it in /trendy-fs-of-the-day, but what
> would it gain us?

Haven't we kind of agreed to use sysfs for things like this? A few years
too late to be raising objections now ;)

One problem I have with sysfs is that it (the directory structure, rather
than the sysfs code itself) really needs to be policed and maintained
by a central and coherent place/person with taste. Otherwise people put
their own random crap with their own random naming schemes and becomes
a crazy mess.

softirqs are not hardware but purely kernel subsystem construct, as such
they probably go under /sys/kernel/. People unfortunately have already
added random crap to the /sys/kernel/ root directory, but future additions
really should go into a good subdirectory structure (putting it into the
root directory is equivalent to ditching all subdirectories from /proc/sys/).

/sys/kernel/softirq/*, I suggest.

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