From: Peter Zijlstra <peterz@infradead.org>
To: Anton Blanchard <anton@samba.org>
Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>,
Ingo Molnar <mingo@elte.hu>, Jens Axboe <jens.axboe@oracle.com>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Rusty Russell <rusty@rustcorp.com.au>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
paulmck@linux.vnet.ibm.com, Milton Miller <miltonm@bga.com>,
Nick Piggin <npiggin@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] smp_call_function_many SMP race
Date: Tue, 23 Mar 2010 13:26:43 +0100 [thread overview]
Message-ID: <1269347203.5279.1650.camel@twins> (raw)
In-Reply-To: <20100323111556.GK24064@kryten>
On Tue, 2010-03-23 at 22:15 +1100, Anton Blanchard wrote:
>
> It turns out commit c0f68c2fab4898bcc4671a8fb941f428856b4ad5 (generic-ipi:
> cleanup for generic_smp_call_function_interrupt()) is at fault. It removes
> locking from smp_call_function_many and in doing so creates a rather
> complicated race.
A rather simple question since my brain isn't quite ready processing the
content here..
Isn't reverting that one patch a simpler solution than adding all that
extra logic? If not, then the above statement seems false and we had a
bug even with that preempt_enable/disable() pair.
Just wondering.. :-)
next prev parent reply other threads:[~2010-03-23 12:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-23 11:15 [PATCH] smp_call_function_many SMP race Anton Blanchard
2010-03-23 12:26 ` Peter Zijlstra [this message]
2010-03-23 15:33 ` Paul E. McKenney
2010-03-23 15:49 ` Peter Zijlstra
2010-03-23 21:31 ` Anton Blanchard
2010-03-23 16:41 ` Paul E. McKenney
2010-05-03 14:24 ` Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2011-01-12 4:07 Anton Blanchard
2011-01-17 18:17 ` Peter Zijlstra
2011-01-18 21:05 ` Milton Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1269347203.5279.1650.camel@twins \
--to=peterz@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=anton@samba.org \
--cc=jens.axboe@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=miltonm@bga.com \
--cc=mingo@elte.hu \
--cc=nickpiggin@yahoo.com.au \
--cc=npiggin@suse.de \
--cc=paulmck@linux.vnet.ibm.com \
--cc=rusty@rustcorp.com.au \
--cc=torvalds@linux-foundation.org \
--cc=xiaoguangrong@cn.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).