From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5897 invoked by alias); 20 Jan 2006 00:48:04 -0000 Received: (qmail 5882 invoked by uid 48); 20 Jan 2006 00:48:03 -0000 Date: Fri, 20 Jan 2006 00:48:00 -0000 From: "anil dot s dot keshavamurthy at intel dot com" To: systemtap@sources.redhat.com Message-ID: <20060120004803.2185.anil.s.keshavamurthy@intel.com> Reply-To: sourceware-bugzilla@sourceware.org Subject: [Bug kprobes/2185] New: Support reentrance from post handler on x86_64 X-Bugzilla-Reason: AssignedTo Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2006-q1/txt/msg00225.txt.bz2 Currently kprobes on x86_64, in case of reentrance from post handler disarm's the probe itself to avoid debug stack corruption and system crash. However I saw this mail form Andi Kleen on discuss x86_64 mailing list on Mon, 16 Jan 2006 01:56:39 +0100 ( http://www.x86-64.org/lists/discuss/msg08165.html ) which now allows nesting of the debug entry point too. So I guess now it should be possible for us to support reentrancy from post handler on x86_64. (Worth a try, so opening this bug) The above patch from Andi also unbreaks recursive kprobes from post handler which got broken starting from 2.6.15-git12. -- Summary: Support reentrance from post handler on x86_64 Product: systemtap Version: unspecified Status: NEW Severity: normal Priority: P2 Component: kprobes AssignedTo: systemtap at sources dot redhat dot com ReportedBy: anil dot s dot keshavamurthy at intel dot com http://sourceware.org/bugzilla/show_bug.cgi?id=2185 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.