From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 637FAEB64DA for ; Tue, 4 Jul 2023 13:42:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231439AbjGDNmI (ORCPT ); Tue, 4 Jul 2023 09:42:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231281AbjGDNmG (ORCPT ); Tue, 4 Jul 2023 09:42:06 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8DBDEE; Tue, 4 Jul 2023 06:42:05 -0700 (PDT) Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 364DTXNs022520; Tue, 4 Jul 2023 13:40:54 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=qnpGbBnDkYYC+z9pQbSW6astkpshRcKvtSylhfCCTXA=; b=fLORtZWQOQlqKyEtg1CH2xPIGv/FAMsdkQthxTu+jYJK/Hv7cWQMHgxL9eLo/UC1Xver 5NdgUWVQrNoH00LYDzPqX1HsxMJIS8A9i+097Z14WbOzXok9+Crl7pytTmGWkKOIsXGY v3+1/6GelphpW7Qw/Eqld6l/DzGdqbnOC09Qm/B4VeQ0CzYAPLviQl9hUBa5gIIK4dae WyBkgmi8woaflAekSjpQoJ28kIuC5h7Ka4CLVcGnVE0iT6Ev4PH0d+HqFK3Yyvxzi623 WtK5/6MHI2AEo77w9uIabHeVw4DyJUY6scnPAln5NDe/cTfD/xH5W/ahfRcPNu380iU7 GQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rmmbpr8q5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 04 Jul 2023 13:40:53 +0000 Received: from m0356517.ppops.net (m0356517.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 364DUHlt024978; Tue, 4 Jul 2023 13:40:52 GMT Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rmmbpr8p9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 04 Jul 2023 13:40:52 +0000 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3647Nkqg020313; Tue, 4 Jul 2023 13:40:49 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma06fra.de.ibm.com (PPS) with ESMTPS id 3rjbddsg6c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 04 Jul 2023 13:40:49 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 364DejUl19268110 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 4 Jul 2023 13:40:46 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C987920040; Tue, 4 Jul 2023 13:40:45 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 522B92004F; Tue, 4 Jul 2023 13:40:44 +0000 (GMT) Received: from li-008a6a4c-3549-11b2-a85c-c5cc2836eea2.ibm.com (unknown [9.155.204.135]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTPS; Tue, 4 Jul 2023 13:40:44 +0000 (GMT) Date: Tue, 4 Jul 2023 15:40:43 +0200 From: Alexander Gordeev To: Hugh Dickins Cc: Gerald Schaefer , Jason Gunthorpe , Andrew Morton , Vasily Gorbik , Mike Kravetz , Mike Rapoport , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Suren Baghdasaryan , Qi Zheng , Yang Shi , Mel Gorman , Peter Xu , Peter Zijlstra , Will Deacon , Yu Zhao , Alistair Popple , Ralph Campbell , Ira Weiny , Steven Price , SeongJae Park , Lorenzo Stoakes , Huang Ying , Naoya Horiguchi , Christophe Leroy , Zack Rusin , Axel Rasmussen , Anshuman Khandual , Pasha Tatashin , Miaohe Lin , Minchan Kim , Christoph Hellwig , Song Liu , Thomas Hellstrom , Russell King , "David S. Miller" , Michael Ellerman , "Aneesh Kumar K.V" , Heiko Carstens , Christian Borntraeger , Claudio Imbrenda , Jann Horn , Vishal Moola , Vlastimil Babka , linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page Message-ID: References: <54cb04f-3762-987f-8294-91dafd8ebfb0@google.com> <20230628211624.531cdc58@thinkpad-T15> <20230629175645.7654d0a8@thinkpad-T15> <7bef5695-fa4a-7215-7e9d-d4a83161c7ab@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7bef5695-fa4a-7215-7e9d-d4a83161c7ab@google.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: BtBza05dswPGCwLp6PNd7IQX4Cdszb6T X-Proofpoint-GUID: ksrVlFb-3Vd1Kbm-HDCPBScRUs9lmkUF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-04_08,2023-07-04_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 bulkscore=0 impostorscore=0 clxscore=1015 malwarescore=0 phishscore=0 mlxlogscore=999 adultscore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307040116 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jul 01, 2023 at 09:32:38PM -0700, Hugh Dickins wrote: > On Thu, 29 Jun 2023, Hugh Dickins wrote: Hi Hugh, ... > No, not quite the same rules as before: I came to realize that using > list_add_tail() for the HH pages would be liable to put a page on the > list which forever blocked reuse of PP list_add_tail() pages after it > (could be solved by a list_move() somewhere, but we have agreed to > prefer simplicity). Just to make things more clear for me: do I understand correctly that this was an attempt to add HH fragments to pgtable_list from pte_free_defer()? Thanks!