From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759446AbYFJJ57 (ORCPT ); Tue, 10 Jun 2008 05:57:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753669AbYFJJ5w (ORCPT ); Tue, 10 Jun 2008 05:57:52 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:41862 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753008AbYFJJ5v (ORCPT ); Tue, 10 Jun 2008 05:57:51 -0400 Date: Tue, 10 Jun 2008 11:57:40 +0200 From: Ingo Molnar To: Abhishek Sagar Cc: rostedt@goodmis.org, Thomas Gleixner , LKML Subject: Re: [PATCH 1/3] ftrace: prevent freeing of all failed updates Message-ID: <20080610095740.GF27706@elte.hu> References: <4842CB9A.1080800@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4842CB9A.1080800@gmail.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0001] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Abhishek Sagar wrote: > Prevent freeing of records which cause problems and correspond to > function from core kernel text. A new flag, FTRACE_FL_CONVERTED is > used to mark a record as "converted". All other records are patched > lazily to NOPs. Failed records now also remain on frace_hash table. > Each invocation of ftrace_record_ip now checks whether the traced > function has ever been recorded (including past failures) and doesn't > re-record it again. applied to tip/tracing/ftrace, thanks Abhishek. Ingo