linux-kernel - Re: [PATCH 1/2] posix-timers: move global timer id management to signal

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Message-ID: <1316474104.2455.32.camel@edumazet-laptop>
Date:	Tue, 20 Sep 2011 01:15:04 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Andi Kleen <andi@...stfloor.org>, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH 1/2] posix-timers: move global timer id management to
 signal_struct v4

Le lundi 19 septembre 2011 à 16:11 -0700, Andi Kleen a écrit :
> > I'll provide not a hack but a clean patch for this.
> 
> Great thanks.
> > I read once idr code, and its not messy at all.
> You're not serious right? Especially the locking scheme is just
> a extreme mess:
> 
> sometimes takes a lock, sometimes requires locking from the caller
> even though the internal lock should be fine, sometimes uses unlocked 
> bitmap
> operations outside a lock, all mixed with a partial RCU implementation,
> no assumption is documented of course.  etc.etc. It's a great poster child
> for messy kernel code.
> 

I dont know, I met more complex code in kernel, but I wont say where ;)



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