linux-kernel - Re: [PATCH -v4] generic-ipi: remove kmalloc()

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Message-Id: <1234901777.4744.233.camel@laptop>
Date:	Tue, 17 Feb 2009 21:16:17 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Jens Axboe <jens.axboe@...cle.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -v4] generic-ipi: remove kmalloc()

On Tue, 2009-02-17 at 21:11 +0100, Peter Zijlstra wrote:
> 
> > As for the previous version. I am almost sure I missed something
> > again, but do we really need both CSD_FLAG_WAIT and CSD_FLAG_LOCK
> > flags? smp_call_function_many(wait => 1) can just wait for
> > !CSD_FLAG_LOCK.
> 
> I suppose we can.

Ah, no, that would mean we cannot distinguish between the sync and async
case in generic_exec_single().

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