From patchwork Thu Jun 30 09:46:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haibo Li X-Patchwork-Id: 12901687 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 9B021C433EF for ; Thu, 30 Jun 2022 10:51:06 +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: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=WyXee+VqlyPEtj+BLzx3+IrLoghIShb8caEBD0fsjSE=; b=cwfxI/lXdOLBwH+qltl5eGLZh+ fqV5pYnWw0fia+gRu7xCFB2l+IOFyy9aVdw+mG7IFnSBIrfvHgURCJ7HlHISkvZ3MPYZZzYARxv2K AQn1hPjOj7E9vhDtR0sujiOoaFygqraG2mYTevSCznP1nJOIOsSnerLiSMTLNNOFl+0krbp4laej+ xeyjw6lNu7VP32lRCn0zPh4YoxANp1I3U6mEDdNZJhEogY/HmGTcalBLHt8fr52AcUhu/geI+lvDy EymsHkwy/mfbItbir41XspWyEIYq6NkjEusC9H6vr0NleNUKqcyriRZypNVPtHcwrer10oiChfhRm 7GulSBXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o6rlD-00Gfne-SB; Thu, 30 Jun 2022 10:50:59 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o6rht-00GeJX-Ch; Thu, 30 Jun 2022 10:47:34 +0000 X-UUID: ca4bc10a5e7142a4a9b3e5d9ca8c9e34-20220630 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.7,REQID:6563c418-2ea2-4ee8-8bd8-bb7424475960,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:5 X-CID-META: VersionHash:87442a2,CLOUDID:9fa241d6-5d6d-4eaf-a635-828a3ee48b7c,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: ca4bc10a5e7142a4a9b3e5d9ca8c9e34-20220630 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1316471158; Thu, 30 Jun 2022 03:47:29 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Thu, 30 Jun 2022 17:46:50 +0800 Received: from mszsdtcf10.gcn.mediatek.inc (10.16.4.60) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Thu, 30 Jun 2022 17:46:49 +0800 From: Haibo Li To: Sami Tolvanen CC: , Kees Cook , "Nathan Chancellor" , Nick Desaulniers , Matthias Brugger , Peter Zijlstra , Masami Hiramatsu , "Christophe Leroy" , =?utf-8?q?Andr=C3=A9_Alme?= =?utf-8?q?ida?= , Luis Chamberlain , Juergen Gross , Haibo Li , Tiezhu Yang , Aaron Tomlin , Dmitry Torokhov , , , , Subject: [PATCH 0/2] ANDROID: cfi:free old cfi shadow asynchronously Date: Thu, 30 Jun 2022 17:46:44 +0800 Message-ID: <20220630094646.91837-1-haibo.li@mediatek.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220630_034733_449570_4605E77D X-CRM114-Status: UNSURE ( 7.94 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Currenly, it uses synchronize_rcu() to wait old rcu reader to go away in update_shadow.In embedded platform like ARM CA7X, load_module blocks 40~50ms in update_shadow. When there are more than one hundred kernel modules, it blocks several seconds. To accelerate load_module,change synchronize_rcu to call_rcu. *** BLURB HERE *** Haibo Li (2): ANDROID: cfi: enable sanitize for cfi.c ANDROID: cfi: free old cfi shadow asynchronously kernel/Makefile | 3 --- kernel/cfi.c | 20 +++++++++++++++++--- 2 files changed, 17 insertions(+), 6 deletions(-)