From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 3106 invoked by alias); 22 May 2007 22:10:29 -0000 Received: (qmail 2820 invoked by uid 48); 22 May 2007 22:10:12 -0000 Date: Tue, 22 May 2007 22:10:00 -0000 Message-ID: <20070522221012.2819.qmail@sourceware.org> From: "wcohen at redhat dot com" To: systemtap@sources.redhat.com In-Reply-To: <20070522162140.4531.wcohen@redhat.com> References: <20070522162140.4531.wcohen@redhat.com> Reply-To: sourceware-bugzilla@sourceware.org Subject: [Bug kprobes/4531] systemtap tests fail produce kernel oops on some configs of 2.6.22-rc2 kernel X-Bugzilla-Reason: AssignedTo Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2007-q2/txt/msg00368.txt.bz2 ------- Additional Comments From wcohen at redhat dot com 2007-05-22 23:10 ------- Put im some diagnostic printk in mark_rodata_ro() for the 2.6.22-rc2. Below is the output: May 22 17:31:36 dhcp231-176 kernel: num_possible_cpus()= 1 May 22 17:31:36 dhcp231-176 kernel: start= ffffffff80207000 end= ffffffff80556000 May 22 17:31:36 dhcp231-176 kernel: Write protecting the kernel read-only data: 3388k Looking up the address from the nm: ffffffff80207000 T _stext ffffffff80556090 R __end_rodata Looks like all the kprobe address falls between those two. ffffffff8043cd00 T schedule This is uniprocessor machine so the process is marking the text as read only too. Thus, the following start point is not used: ffffffff804449a8 A _etext -- http://sourceware.org/bugzilla/show_bug.cgi?id=4531 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.