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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 062C2C433EF for ; Tue, 28 Sep 2021 03:11:45 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A91076124B for ; Tue, 28 Sep 2021 03:11:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A91076124B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 17F0D900003; Mon, 27 Sep 2021 23:11:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 109BB900002; Mon, 27 Sep 2021 23:11:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E9D13900003; Mon, 27 Sep 2021 23:11:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0193.hostedemail.com [216.40.44.193]) by kanga.kvack.org (Postfix) with ESMTP id D4674900002 for ; Mon, 27 Sep 2021 23:11:43 -0400 (EDT) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 8011D181CC1DA for ; Tue, 28 Sep 2021 03:11:43 +0000 (UTC) X-FDA: 78635507286.23.D544E31 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by imf18.hostedemail.com (Postfix) with ESMTP id 2F4B94002085 for ; Tue, 28 Sep 2021 03:11:43 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 95E6C222DF; Tue, 28 Sep 2021 03:11:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1632798701; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=k1irZcE6GgE63UfMaZ69q7wFQxdxy8PkJV1UDRuOwDA=; b=Af8PPYiGG/KoV03reINXBzNVPccmiyHVMrwNt2UIFxlU1jhXBp5nI2Gka9opvfla6EYXOa u9dubE+5BF4AwBJlVzPfA+nwLlAQkhckDkag+FkKT+kBsnwd6qmqqlWA/pOjn0C1Ffe5V9 HYSxfFfncwL3S6Y8kijKplmMugjgsEE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1632798701; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=k1irZcE6GgE63UfMaZ69q7wFQxdxy8PkJV1UDRuOwDA=; b=rvEM/v30W6HdMnLZksiPaBfoRjZ8iPYI6P23HeASJG7DpSxpqPRoywlWfOvhpMFCEARX9U W3t0wcFCENMdaDDw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id C1463132D4; Tue, 28 Sep 2021 03:11:32 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id HD3CH+SHUmHafwAAMHmgww (envelope-from ); Tue, 28 Sep 2021 03:11:32 +0000 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit MIME-Version: 1.0 From: "NeilBrown" To: "David Howells" Cc: willy@infradead.org, hch@lst.de, trond.myklebust@primarydata.com, "Theodore Ts'o" , linux-block@vger.kernel.org, ceph-devel@vger.kernel.org, "Trond Myklebust" , "Darrick J. Wong" , "Jeff Layton" , "Andreas Dilger" , "Anna Schumaker" , linux-mm@kvack.org, "Bob Liu" , "Darrick J. Wong" , "Josef Bacik" , "Seth Jennings" , "Jens Axboe" , linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-cifs@vger.kernel.org, "Chris Mason" , "David Sterba" , "Minchan Kim" , "Steve French" , "Dan Magenheimer" , linux-nfs@vger.kernel.org, "Ilya Dryomov" , linux-btrfs@vger.kernel.org, dhowells@redhat.com, viro@zeniv.linux.org.uk, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: [RFC][PATCH v3 0/9] mm: Use DIO for swap and fix NFS swapfiles In-reply-to: <163250387273.2330363.13240781819520072222.stgit@warthog.procyon.org.uk> References: <163250387273.2330363.13240781819520072222.stgit@warthog.procyon.org.uk> Date: Tue, 28 Sep 2021 13:11:29 +1000 Message-id: <163279868982.18792.10448745714922373194@noble.neil.brown.name> Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=Af8PPYiG; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b="rvEM/v30"; spf=pass (imf18.hostedemail.com: domain of neilb@suse.de designates 195.135.220.28 as permitted sender) smtp.mailfrom=neilb@suse.de; dmarc=pass (policy=none) header.from=suse.de X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 2F4B94002085 X-Stat-Signature: 7f6toue959nkk177i86nhkznoabostfx X-HE-Tag: 1632798703-740537 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sat, 25 Sep 2021, David Howells wrote: > Whilst trying to make this work, I found that NFS's support for swapfiles > seems to have been non-functional since Aug 2019 (I think), so the first > patch fixes that. Question is: do we actually *want* to keep this > functionality, given that it seems that no one's tested it with an upstream > kernel in the last couple of years? SUSE definitely want to keep this functionality. We have customers using it. I agree it would be good if it was being tested somewhere.... Thanks, NeilBrown