linux-kernel - Re: [patch 00/11] ANNOUNCE: "Syslets", generic asynchronous system call support

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Message-ID: <20070213224322.GL22104@elte.hu>
Date:	Tue, 13 Feb 2007 23:43:22 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Davide Libenzi <davidel@...ilserver.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@....com.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ulrich Drepper <drepper@...hat.com>,
	Zach Brown <zach.brown@...cle.com>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	"David S. Miller" <davem@...emloft.net>,
	Benjamin LaHaise <bcrl@...ck.org>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [patch 00/11] ANNOUNCE: "Syslets", generic asynchronous system call support


* Andi Kleen <andi@...stfloor.org> wrote:

> > ok, that should work fine already - exit in the user context gets
> 
> That would be a little heavy handed. I wouldn't expect my GUI program 
> to quit itself on cancel. And requiring it to create a new thread just 
> to exit on cancel would be also nasty.
> 
> And of course you cannot interrupt blocked IOs this way right now 
> (currently it only works with signals in some cases on NFS)

ok. The TID+signal approach i mentioned in the other reply should work. 
If it's frequent enough we could make this an explicit 
sys_async_cancel(TID) API.

	Ingo
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