From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Mon, 23 Mar 2009 17:38:38 +0100 From: Ingo Molnar Subject: Re: [patch] fix ptrace slowness Message-ID: <20090323163838.GA24454@elte.hu> References: <20090323151954.GC21267@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Miklos Szeredi Cc: 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: * 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. okay - i've queued up your fix. Ingo