From nobody Fri Sep 20 09:33:29 2024 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 F24A0E92FE7 for ; Fri, 6 Oct 2023 06:03:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230113AbjJFGDM (ORCPT ); Fri, 6 Oct 2023 02:03:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230111AbjJFGDI (ORCPT ); Fri, 6 Oct 2023 02:03:08 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A921CA for ; Thu, 5 Oct 2023 23:03:01 -0700 (PDT) X-UUID: fbe11006640d11ee8051498923ad61e6-20231006 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=G6RcZSK2ZXZNwpAYwk74iwfftVFpwiXwgGnN1wemDVw=; b=syw1zc431l5KIJZODYIQi5CbSTVuN9t949ZwOquQStJcrQxqfM4dyAyBTlMRx4DHMvK6x1g01oGFVwgYGgkSLRBgQ6jhIsEPNoJ5NFDqVBL2Sggb2CZ+a39x2PZh5SddFk0zTLVqWHwWgBgKZjpdLcu9/UL6yVYa5/aANyBpjvE=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.32,REQID:9d930bb0-0d52-4a24-94ad-ecc8885f1e83,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:5f78ec9,CLOUDID:7dc581f0-9a6e-4c39-b73e-f2bc08ca3dc5,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File: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 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: fbe11006640d11ee8051498923ad61e6-20231006 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 810643480; Fri, 06 Oct 2023 14:02:51 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 6 Oct 2023 14:02:50 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 6 Oct 2023 14:02:50 +0800 From: Mark-PK Tsai To: Minchan Kim , Sergey Senozhatsky , Andrew Morton , Matthias Brugger , AngeloGioacchino Del Regno CC: , Mark-PK Tsai , , , , Subject: [PATCH] zsmalloc: use copy_page for full page copy Date: Fri, 6 Oct 2023 14:02:40 +0800 Message-ID: <20231006060245.7411-1-mark-pk.tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Some architectures have implemented optimized copy_page for full page copying, such as arm. On my arm platform, use the copy_page helper for single page copying is about 10 percent faster than memcpy. Signed-off-by: Mark-PK Tsai Reviewed-by: Sergey Senozhatsky --- mm/zsmalloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index c743ce7a5f49..b1c0dad7f4cf 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1839,7 +1839,7 @@ static int zs_page_migrate(struct page *newpage, stru= ct page *page, * Here, any user cannot access all objects in the zspage so let's move. */ d_addr =3D kmap_atomic(newpage); - memcpy(d_addr, s_addr, PAGE_SIZE); + copy_page(d_addr, s_addr); kunmap_atomic(d_addr); =20 for (addr =3D s_addr + offset; addr < s_addr + PAGE_SIZE; --=20 2.18.0