From patchwork Thu Sep 19 11:29:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qun-Wei Lin X-Patchwork-Id: 13807658 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 00D82CE8D78 for ; Thu, 19 Sep 2024 11:32:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=pFtDBXloIcerwPHPWpyl2alet9mKUnrBwiIRPJMroSA=; b=JM0h3Y1gIhZVfptAg+d9YCpnTH KJ7LtmOZZJrmAXvISm4alhKfecKgzYN2EIDKZejsb02l2LGUR2ZNFXCWPF8O1mkSX5RlpDeavMFn+ vpFW2gepFQzaQcHx1HtOWC0E0vc2KJfui2Tem2l7u+6SDpn3H80TvWiq0ZXYOG/xfZwYMTHX0f7IR kJm9AsCrVpte4wbQVxoZ9ufSyELLbxa8EU7AD+4IcKRUDec1xtLvKkjTJoHopc1UyTXLiPwsxSEfG 3u9IfpO/BsPB0+PeqagF0horWNUKiIkjXASQC+SUWvUdOUyTi/hdfz2K+NrO362jTQ7D8TDdNkZXl IsESg3Hg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1srFOm-0000000AATH-2DF4; Thu, 19 Sep 2024 11:32:36 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1srFMa-0000000AA3E-2qQ7; Thu, 19 Sep 2024 11:30:22 +0000 X-UUID: 8a8715ec767a11efb3adad29d29602c1-20240919 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=pFtDBXloIcerwPHPWpyl2alet9mKUnrBwiIRPJMroSA=; b=f+gsnbtGned9LkWJWc5NbYauoXN3t+I+B8r4NjplArVdmHSzRv8ml7tuNqPBcjEleuZBvJcEc7x/DdJSmnUoKjYJHtTizVLH01mqp0w6vDQrz+gEhjtEoum6xezrvN6cpBTVZw5kPv9kNxDBR7lniBr8+8A1yQmW+Zbw2VIgqQ0=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.41,REQID:96634d60-0bd6-4ea4-8fd4-e17ba12fd980,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:6dc6a47,CLOUDID:e5f03d9e-8e9a-4ac1-b510-390a86b53c0a,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1, SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 8a8715ec767a11efb3adad29d29602c1-20240919 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1765836027; Thu, 19 Sep 2024 04:30:15 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 19 Sep 2024 19:30:10 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 19 Sep 2024 19:30:10 +0800 From: Qun-Wei Lin To: Andrew Morton , Matthias Brugger , AngeloGioacchino Del Regno , Ryan Roberts , "Huang, Ying" , "David Hildenbrand" , Chris Li , "Matthew Wilcox (Oracle)" , Al Viro , "Dan Schatzberg" , Kairui Song , Barry Song , Jens Axboe CC: , , , , , Casper Li , "Chinwen Chang" , Andrew Yang , John Hsu , , Qun-Wei Lin Subject: [PATCH 0/2] Add BLK_FEAT_READ_SYNCHRONOUS and SWP_READ_SYNCHRONOUS_IO Date: Thu, 19 Sep 2024 19:29:50 +0800 Message-ID: <20240919112952.981-1-qun-wei.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--2.319100-8.000000 X-TMASE-MatchedRID: y/MOm6ldwRLxEHpzyfiYCrCvlllU7Dl1u56wFPSkMVFsmSfP7d/dpYhK asDlRLg0PMCTxZ0FhhdYo3G+rvxrNUkjllSXrjtQFEUknJ/kEl5q8/xv2Um1avoLR4+zsDTttrr TuahHzlGpp01G3uBXtb0XhwlNA8MHofnMcDO+aeBJiBkhcxr75pWf1beiAmbTHliXM5eW2aacaV HiDzvLgZJWAqw/Km95o4s7o73brFxJmt82E/eyBQGH0CAFIQWsmb5gmylW+PbGS+seVPx64j6Qr n3xh/cy X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--2.319100-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 934E8F1C009F82DA8C65E157967D6F7A839701E4510113EE88E9F19DE3C52A232000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240919_043020_751466_2FCAF1BB X-CRM114-Status: UNSURE ( 9.64 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patchset introduces 2 new feature flags, BLK_FEAT_READ_SYNCHRONOUS and SWP_READ_SYNCHRONOUS_IO. These changes are motivated by the need to better accommodate certain swap devices that support synchronous read operations but asynchronous write operations. The existing BLK_FEAT_SYNCHRONOUS and SWP_SYNCHRONOUS_IO flags are not sufficient for these devices, as they enforce synchronous behavior for both read and write operations. Patch 1: - introduce BLK_FEAT_READ_SYNCHRONOUS Patch 2: - introduce SWP_READ_SYNCHRONOUS_IO Qun-Wei Lin (2): block: add BLK_FEAT_READ_SYNCHRONOUS feature for synchronous read mm, swap: introduce SWP_READ_SYNCHRONOUS_IO include/linux/blkdev.h | 8 ++++++++ include/linux/swap.h | 31 ++++++++++++++++--------------- mm/memory.c | 3 ++- mm/page_io.c | 2 +- mm/swapfile.c | 3 +++ 5 files changed, 30 insertions(+), 17 deletions(-)