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 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 4C524C43334 for ; Thu, 30 Jun 2022 10:52:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id: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=t4R82flH0J5qGLEkWRFDMvu88NcyanxAZ+HGWwkX7B4=; b=lJYMWphEdlLXL/ RgZmJBzCI777qtHbElHw5U6Jevzz9ewmObqsgvxTo0Bs3VS+zL6XuWqCudhQh2UGGOhh0doumzHr2 4Zv2Ai31AxLBnjSju5Nd0D7gmics+M57BDdqvYJEVTgMIrFxuA7wAhc1xr5Wwl5bXV6ftw8FSjLfb s45/bCVBI6QYIaQCQs4hSdSo9egvn6hUQ3+REs2AsF3M3Ugsd7nmrYjV/DGaeQR1+sFlsEOu9xrXN NWQ1tvwP74/UvBXhCZaGYE/3SGFU3mfGDImivl8VbVd5FjMcepJ3Qi4so7NPRrIvFXPLtct4jykmr xlwOvMObhBYwiOS1ReDQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o6rlN-00Gfq8-B6; Thu, 30 Jun 2022 10:51:10 +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=20Almeida?= , 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-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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=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(-) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel