linux-kernel - [PATCH 0/4 v3] smp_call_function

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Message-ID: <smp-call-function-intro-v3@mdm.bga.com>
Date:	Tue, 15 Mar 2011 13:27:15 -0600
From:	Milton Miller <miltonm@....com>
To:	Peter Zijlstra <peterz@...radead.org>, akpm@...ux-foundation.org
Cc:	Anton Blanchard <anton@...ba.org>, xiaoguangrong@...fujitsu.com,
	mingo@...e.hu, jaxboe@...ionio.com, npiggin@...il.com,
	rusty@...tcorp.com.au, efault@....de,
	Jan Beulich <JBeulich@...ell.com>,
	Dimitri Sivanich <sivanich@....com>,
	Tony Luck <tony.luck@...el.com>, torvalds@...ux-foundation.org,
	paulmck@...ux.vnet.ibm.com, benh@...nel.crashing.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/4 v3] smp_call_function_many issues from review

Picking up this thread from the beginning of Feburary,  I updated
the comments in 3 and 4 based on Paul's review.  I have inserted
my proposed alternative to Paul's additional patch as patch 2,
and tweaked the changelog on 1.

[PATCH 1/4 v3] call_function_many: fix list delete vs add race
[PATCH 2/4 v3] call_function_many: add missing ordering
[PATCH 3/4 v3] smp_call_function_many: handle concurrent clearing of mask
[PATCH 4/4 v3] smp_call_function_interrupt: use typedef and %pf

Peter Z acked a prior version of patch 1, and Mike Galbraith has
done some stress testing on the combinaton of 1,3,4, and Paul's patch.

The prior posting of this series is available here:
https://patchwork.kernel.org/patch/522021/
https://patchwork.kernel.org/patch/522031/
http://marc.info/?l=linux-kernel&m=129654439817236&w=2

And Paul's additional patch from review was here
https://patchwork.kernel.org/patch/525891/

Looking forward, I would suggest 1 and 2 are required for stable, 3 may
be suitable as it fixes races that otherwise requires cpumask copies
as in 75c1c91cb92806f960fcd6e53d2a0c21f343081c ([IA64] eliminate race
condition in smp_flush_tlb_mm).  By contrast 4 is just comments except
for the %pS to %pf change.

Dimitri or Tony, let me know if you would like a revert patch for
75c1c91c to be added after patch 3.

milton
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