linux-kernel - Re: [patch] fix ptrace slowness

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Date:	Mon, 23 Mar 2009 17:38:38 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	linux-kernel@...r.kernel.org, oleg@...hat.com,
	peterz@...radead.org, roland@...hat.com, efault@....de,
	rjw@...k.pl, jdike@...toit.com,
	user-mode-linux-devel@...ts.sourceforge.net,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	stable@...nel.org
Subject: Re: [patch] fix ptrace slowness


* Miklos Szeredi <miklos@...redi.hu> wrote:

> On Mon, 23 Mar 2009, Ingo Molnar wrote:
> > * Miklos Szeredi <miklos@...redi.hu> wrote:
> > 
> > > This one incorporates comments from Oleg and Ingo.  Please apply 
> > > to 2.6.29 and 2.6.2[78]-stable trees.
> > 
> > The fix first needs to go upstream. There's an alternative patch 
> > below. Would you mind to give it a test? Chances are that it 
> > will make UML even faster than your fix.
> 
> Just the opposite.  With my patch a UML image boots in 17 
> seconnds, with your patch it boots in 33 seconds.  Without either 
> patch it boots in about 5 minutes.

okay - i've queued up your fix.

	Ingo
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