linux-kernel - Re: [PATCH 0/4] x86: add cpus

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Message-Id: <20080410103008.e4c053b9.pj@sgi.com>
Date:	Thu, 10 Apr 2008 10:30:08 -0500
From:	Paul Jackson <pj@....com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	travis@....com, tglx@...utronix.de, hpa@...or.com,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] x86: add cpus_scnprintf function v2

Ingo, responding to Paul, three days ago:
> i dont mind the old patch either (which did an ugly temporary 
> allocation), if it keeps the ABI.

But this v2 and earlier patch versions broke the kernel-user interface,
incompatibly, for about a dozen different /sys and /proc files, and
without even stating so very clearly in the patch commentary.  We'd
have to be rather desperate before I'd agree to that.

Mike's latest v3 version of this cpus_scnprintf patchset has resolved
these incompatibilities, by adding new *list files in /sys and /proc,
and new *list line items in the /proc/<pid>/status files, rather than
breaking existing files and lines.

That is much better.  Better to add files and lines, than to change the
format of existing ones.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.940.382.4214
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