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 22D02C43334 for ; Thu, 30 Jun 2022 09:46:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234488AbiF3Jq5 (ORCPT ); Thu, 30 Jun 2022 05:46:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50816 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234095AbiF3Jq4 (ORCPT ); Thu, 30 Jun 2022 05:46:56 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CCD642EE6 for ; Thu, 30 Jun 2022 02:46:55 -0700 (PDT) X-UUID: 8c2a2bdaf553407bbbbc90c751819423-20220630 X-CID-UNFAMILIAR: 1 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.7,REQID:34b29601-5dbe-4836-b6a9-7f5abbaa8bc5,OB:0,LO B:10,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:100,FILE:0,RULE:Release_Ham,A CTION:release,TS:105 X-CID-INFO: VERSION:1.1.7,REQID:34b29601-5dbe-4836-b6a9-7f5abbaa8bc5,OB:0,LOB: 10,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:100,FILE:0,RULE:Spam_GS981B3D,A CTION:quarantine,TS:105 X-CID-META: VersionHash:87442a2,CLOUDID:b45940d6-5d6d-4eaf-a635-828a3ee48b7c,C OID:2123257b355c,Recheck:0,SF:28|16|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:1,File:nil,QS:nil,BEC:nil,COL:0 X-UUID: 8c2a2bdaf553407bbbbc90c751819423-20220630 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 757862333; Thu, 30 Jun 2022 17:46:51 +0800 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 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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