linux-kernel - Re: [patch 3/7] epoll keyed wakeups - introduce key-aware wakeup macros

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Message-ID: <20090131130646.GA3986@elte.hu>
Date:	Sat, 31 Jan 2009 14:06:46 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Davide Libenzi <davidel@...ilserver.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	David Miller <davem@...emloft.net>
Subject: Re: [patch 3/7] epoll keyed wakeups - introduce key-aware wakeup
	macros


* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> On Sat, 31 Jan 2009, Ingo Molnar wrote:
> > 
> > Would be nice to see the kernel image size increase due to this change 
> > (which gives a good measure about how much of an issue this is).
> 
> Ingo, I don't think you have looked at that header file for a while.
> 
> It's already doing that, Davide just changed the names a bit:
> 
> 	#define wake_up_interruptible(x)        __wake_up(x, TASK_INTERRUPTIBLE, 1, NULL)
> 
> and the extra parameter is already there in the caller.

Yeah, indeed - i should have noticed the absense of new function 
prototypes in the patch ... and in any case i shouldnt post at 4am ;)

> (Yeah, Davide did add it to __wake_up_locked and __wake_up_sync, but 
> those are really not the common cases).
> 
> Sure, we can change those #define's to be actual functions (and perhaps 
> not export the low-level __wake_up() functions at all), since it's true 
> that it would probably shrink the kernel size, but that is really a 
> totally independent issue from the whole epoll wakeups thing.

Yeah. Will have a look at that independently of Davide's patch.

	Ingo
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