From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760039Ab2FAPA7 (ORCPT ); Fri, 1 Jun 2012 11:00:59 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:8445 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759104Ab2FAPA6 (ORCPT ); Fri, 1 Jun 2012 11:00:58 -0400 X-Authority-Analysis: v=2.0 cv=eIiRfQV1 c=1 sm=0 a=ZycB6UtQUfgMyuk2+PxD7w==:17 a=XQbtiDEiEegA:10 a=Ciwy3NGCPMMA:10 a=q6E-Bh13THwA:10 a=5SG0PmZfjMsA:10 a=bbbx4UPp9XUA:10 a=meVymXHHAAAA:8 a=VwQbUJbxAAAA:8 a=jjtBtDzv-8ZTsxaYZnEA:9 a=QEXdDO2ut3YA:10 a=ObvkPf1i8bUTJAiDNwkA:9 a=ZycB6UtQUfgMyuk2+PxD7w==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.80.29 Message-Id: <20120601145702.428441016@goodmis.org> User-Agent: quilt/0.60-1 Date: Fri, 01 Jun 2012 10:57:02 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Peter Zijlstra , Frederic Weisbecker , Masami Hiramatsu , "H. Peter Anvin" , Dave Jones , Andi Kleen Subject: [PATCH 0/5 v2] [RFC] ftrace: Fix bug with function tracing and lockdep Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="00GvhwF7k39YY" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --00GvhwF7k39YY Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable This is an updated version with input from H. Peter Anvin and Peter Zijlstr= a. It may still not be up to par to actually pull. I would like to hear more comments from people. Yes, the NMI/INT3/Lockdep is complex. But I believe this is the nature of the beast. If someone can come up with a simpler solution, I'm all ears. Right now, the upstream tree has a bug when enabling function tracer when lockdep is enabled that may crash the system. Thoughts on this? -- Steve These are in the latest tip/perf/urgent-2 tree, which can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git tip/perf/urgent-2 Head SHA1: 5963e317b1e9d2a4511503916d8fd664bb8fa8fb Steven Rostedt (5): ftrace: Synchronize variable setting with breakpoints ftrace: Use breakpoint method to update ftrace caller x86: Reset the debug_stack update counter x86: Allow nesting of the debug stack IDT setting ftrace/x86: Do not change stacks in DEBUG when calling lockdep ---- arch/x86/include/asm/ftrace.h | 2 +- arch/x86/kernel/cpu/common.c | 8 +++- arch/x86/kernel/entry_64.S | 44 ++++++++++++++++-- arch/x86/kernel/ftrace.c | 102 +++++++++++++++++++++++++++++++++++++= +--- arch/x86/kernel/nmi.c | 6 ++- arch/x86/kernel/traps.c | 8 +++- 6 files changed, 154 insertions(+), 16 deletions(-) --00GvhwF7k39YY Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJPyNklAAoJEIy3vGnGbaoAsUcQAKUh2lrjTYSR3vCmXC/fzxk7 KGKgHX9+6uxgcOFNboL2tKEWECY9X2XxTaXu2ViS7vTfk4fq8kQLMjclVrIGMcnT 20coUUtIRwzxeVERZdBgYYwxyPjNC+kXOg71PFb2b0QpAxSzQXUkzAmcdmbljOTj teLXbtEQjFA2sW57CB3IxSkXQYrltNXnidqHliYsJs1gTk864gLcNvGsBJ+u2JRw 0E49BSGfywi9ccvdchRP/kVrIp3gWle18qTTA6Ez8Wh1hDkHD94fPc65R7wVSwEc NBBqboXNX4kFxy+65OBxZLDokgZzj0K2Yu0N99LRCmG+pFyKyZ9w4IlgzYlHX1n0 CSEMqZFBK41IISsanMRBS6cW7j7TTtKZnOQwKBc5rELpNf+Wm/nMX10xOVJWgTXH aLlrQzB63ca68BYh7mvSPqu6+z9lLnvBhXPDKLAenbTTgyAngT3s91SWP1hUhZYc 8EOIfxA2x6d3q6RxEqNf+pFxwozfWJx5F5StmbG69I9KDvxl7Kokit8Ef7gDZvGP ojFHAOJ/o0qmtDg/d0KwnQY9OA698j0pfiYyMbmuFltMyrPV3FpUg9GX20L7K5ib oLebhyECmUqTtG+KxrPhApgWff6cVB2M6vpH0ZkPwnFApPHVasyiistfpy+HWVXA kD3KSwKqODzqM2mG8gLj =2L8D -----END PGP SIGNATURE----- --00GvhwF7k39YY--