From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <49C7DE25.4030706@googlemail.com> Date: Mon, 23 Mar 2009 20:08:21 +0100 From: Michael Riepe MIME-Version: 1.0 Subject: Re: [patch] fix ptrace slowness References: <20090323151954.GC21267@elte.hu> In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org To: Miklos Szeredi Cc: mingo@elte.hu, linux-kernel@vger.kernel.org, oleg@redhat.com, peterz@infradead.org, roland@redhat.com, efault@gmx.de, rjw@sisk.pl, jdike@addtoit.com, user-mode-linux-devel@lists.sourceforge.net, torvalds@linux-foundation.org, akpm@linux-foundation.org, stable@kernel.org List-ID: Hi! Miklos Szeredi wrote: > On Mon, 23 Mar 2009, Ingo Molnar wrote: > >>* Miklos Szeredi 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. My strace test case runs 60% faster with this patch (compared to Ingo's). -- Michael "Tired" Riepe X-Tired: Each morning I get up I die a little