From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753634AbcEPNzV (ORCPT ); Mon, 16 May 2016 09:55:21 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:33660 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751815AbcEPNy7 (ORCPT ); Mon, 16 May 2016 09:54:59 -0400 Date: Mon, 16 May 2016 15:54:42 +0200 From: Ingo Molnar To: Dmitry Safonov Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, luto@amacapital.net, tglx@linutronix.de, hpa@zytor.com, x86@kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, 0x7f454c46@gmail.com, Shuah Khan , linux-kselftest@vger.kernel.org Subject: Re: [PATCHv8 resend 2/2] selftest/x86: add mremap vdso test Message-ID: <20160516135442.GA14452@gmail.com> References: <1462886951-23376-1-git-send-email-dsafonov@virtuozzo.com> <1462886951-23376-2-git-send-email-dsafonov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1462886951-23376-2-git-send-email-dsafonov@virtuozzo.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Dmitry Safonov wrote: > Should print on success: > [root@localhost ~]# ./test_mremap_vdso_32 > AT_SYSINFO_EHDR is 0xf773f000 > [NOTE] Moving vDSO: [f773f000, f7740000] -> [a000000, a001000] > [OK] > Or segfault if landing was bad (before patches): > [root@localhost ~]# ./test_mremap_vdso_32 > AT_SYSINFO_EHDR is 0xf774f000 > [NOTE] Moving vDSO: [f774f000, f7750000] -> [a000000, a001000] > Segmentation fault (core dumped) Can the segfault be caught and recovered from, to print a proper failure message? Thanks, Ingo