linux-kernel - Re: [PATCH 07/19] ptrace: use bit_waitqueue for TRAPPING instead of wait

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Message-ID: <25746.1306357694@localhost>
Date:	Wed, 25 May 2011 17:08:14 -0400
From:	Valdis.Kletnieks@...edu
To:	Tejun Heo <tj@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>, oleg@...hat.com,
	vda.linux@...glemail.com, jan.kratochvil@...hat.com,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	indan@....nu, bdonlan@...il.com, pedro@...esourcery.com
Subject: Re: [PATCH 07/19] ptrace: use bit_waitqueue for TRAPPING instead of wait_chldexit

On Wed, 25 May 2011 16:42:14 +0200, Tejun Heo said:

> > You can get a good idea of the code quality if you grep for users. I
> > don't think it's an accident at all that the two big blocks are
> > ide-tape and some infiniband drivers.
> 
> Maybe, but also ilog2() is relatively new and most already had ways to
> deal with bit positions and masks, so the uptake is expected to be
> slow.

One has to wonder how ide-tape got to be a early-adopter user of *anything*.

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