linux-kernel - Re: [PATCH 1/11] Add generic helpers for arch IPI function calls

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Message-ID: <480DF861.6000705@qumranet.com>
Date:	Tue, 22 Apr 2008 17:38:25 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Jens Axboe <jens.axboe@...cle.com>
CC:	Peter Zijlstra <peterz@...radead.org>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, npiggin@...e.de,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH 1/11] Add generic helpers for arch IPI function calls

Jens Axboe wrote:
>> Introducing this fallback will make any usage from irq disabled context
>> deadlock prone.
>>
>> I rather like the current interface.
>>     
>
> Hmm good point, I'll back that bit out again.
>   

But then you need to fix all callers to handle errors.

Perhaps we need a new flag for failable async IPIs (or better, API).  
I'm pretty sure no one uses s_c_f_s() from irq disabled context on x86, 
since it will WARN_ON(irqs_disabled()).

-- 
error compiling committee.c: too many arguments to function

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