Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934020AbaD2MYK (ORCPT ); Tue, 29 Apr 2014 08:24:10 -0400 Received: from e23smtp05.au.ibm.com ([202.81.31.147]:56331 "EHLO e23smtp05.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932982AbaD2MYJ (ORCPT ); Tue, 29 Apr 2014 08:24:09 -0400 Message-ID: <535F997B.3000500@linux.vnet.ibm.com> Date: Tue, 29 Apr 2014 17:52:19 +0530 From: Anshuman Khandual User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: Michael Neuling CC: avagin@openvz.org, roland@redhat.com, oleg@redhat.com, Linux PPC dev , linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/3] Add new ptrace request macros on PowerPC References: <1396422144-11032-1-git-send-email-khandual@linux.vnet.ibm.com> <533BD922.4070009@linux.vnet.ibm.com> <535F4E10.2020300@linux.vnet.ibm.com> <535F5BDE.2030309@linux.vnet.ibm.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14042912-1396-0000-0000-000004C202C6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/29/2014 01:52 PM, Michael Neuling wrote: > That's not what that patch does. It shouldn't make any user visible changes > to DSCR or PPR. It may not when it runs uninterrupted but after the tracee process has stopped, thread.dscr reflects the default DSCR value as mentioned before. This can be proved by changing the "dscr_default" value in arch/powerpc/sysfs.c file. > > Over syscall PPR and DSCR may change. Depending on your test case, that may > be your problem. I would guess when the tracee process stops for ptrace analysis, tm_reclaim or tm_recheckpoint path might be crossed which is causing this dscr_default value to go into thread_struct. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/