linux-kernel - Re: [RESEND][RFC PATCH v2] waitfd

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Date:	Wed, 7 Jan 2009 09:52:46 -0800 (PST)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Oleg Nesterov <oleg@...hat.com>
cc:	Ingo Molnar <mingo@...e.hu>, Casey Dahlin <cdahlin@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Roland McGrath <roland@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [RESEND][RFC PATCH v2] waitfd

On Wed, 7 Jan 2009, Oleg Nesterov wrote:

> minor nit...
> 
> Please note that unlike other sys_...fd() syscalls, sys_waitfd()
> doesn't allow to pass O_CLOEXEC. Looks like we need a separate
> "flags" argument...

I said this even during the first post. Not a minor nit unless we want to 
have a sys_waitfd2 soon after.


> Also, ioctl(FIONBIO) or fcntl(O_NONBLOCK) have no effect on
> waitfd, not very good.

Ack.

 
> I'd suggest to remove WNOHANG from waitfd_ctx->ops and treat
> (->f_flags & O_NONBLOCK) as WNOHANG.

Ack.


> (can't resist, ->ops is not the best name ;)

Ack. "flags" looks a pretty nice shot at it.



- Davide


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