From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S968307AbeE2WV3 (ORCPT ); Tue, 29 May 2018 18:21:29 -0400 Received: from aserp2130.oracle.com ([141.146.126.79]:45162 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967686AbeE2WVX (ORCPT ); Tue, 29 May 2018 18:21:23 -0400 Subject: Re: [PATCH 2/2] fs, elf: drop MAP_FIXED usage from elf_map To: Michal Hocko Cc: Andrew Morton , linux-mm@kvack.org, LKML , libhugetlbfs@googlegroups.com References: <20171129144219.22867-1-mhocko@kernel.org> <20171129144219.22867-3-mhocko@kernel.org> <93ce964b-e352-1905-c2b6-deedf2ea06f8@oracle.com> From: Mike Kravetz Message-ID: Date: Tue, 29 May 2018 15:21:14 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: <93ce964b-e352-1905-c2b6-deedf2ea06f8@oracle.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8908 signatures=668702 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1805220000 definitions=main-1805290237 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Just a quick heads up. I noticed a change in libhugetlbfs testing starting with v4.17-rc1. V4.16 libhugetlbfs test results ********** TEST SUMMARY * 2M * 32-bit 64-bit * Total testcases: 110 113 * Skipped: 0 0 * PASS: 105 111 * FAIL: 0 0 * Killed by signal: 4 1 * Bad configuration: 1 1 * Expected FAIL: 0 0 * Unexpected PASS: 0 0 * Test not present: 0 0 * Strange test result: 0 0 ********** v4.17-rc1 (and later) libhugetlbfs test results ********** TEST SUMMARY * 2M * 32-bit 64-bit * Total testcases: 110 113 * Skipped: 0 0 * PASS: 98 111 * FAIL: 0 0 * Killed by signal: 11 1 * Bad configuration: 1 1 * Expected FAIL: 0 0 * Unexpected PASS: 0 0 * Test not present: 0 0 * Strange test result: 0 0 ********** I traced the 7 additional (32-bit) killed by signal results to this commit 4ed28639519c fs, elf: drop MAP_FIXED usage from elf_map. libhugetlbfs does unusual things and even provides custom linker scripts. So, in hindsight this change in behavior does not seem too unexpected. I JUST discovered this while running libhugetlbfs tests for an unrelated issue/change and, will do some analysis to see exactly what is happening. Also, will take it upon myself to run libhugetlbfs test suite on a regular (at least weekly) basis. -- Mike Kravetz