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 F2403EB64DC for ; Mon, 26 Jun 2023 17:14:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230416AbjFZROD (ORCPT ); Mon, 26 Jun 2023 13:14:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230079AbjFZROA (ORCPT ); Mon, 26 Jun 2023 13:14:00 -0400 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFAF1E59 for ; Mon, 26 Jun 2023 10:13:59 -0700 (PDT) Received: by mail-pl1-x632.google.com with SMTP id d9443c01a7336-1b7ffab7ff1so7803605ad.2 for ; Mon, 26 Jun 2023 10:13:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687799639; x=1690391639; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=rm5U58cD44+DDKBRtN3VxAo0yyecspa336dzUa4UwTo=; b=aI8AZTzdbTFTc9aZaQ69mXSrqJz8ntv6XBHtRuJ+ekDoeQx/KVIMC6vB47neSkI5oF dnjgxnIQvm1XAu5iMJYOq4IBHYDm6PUjtT7dMy4lUFvJ/g7rChURMmyy6RV5nNAP5H4S rDSeobE634bpdDnWPO3ofSQWJG+28O5xExYDD364r07q/d3osWRT1DYZ5++e1Jqks7Cd dxG8tPBivYmGQJJRG8sqwqr4FbLOHUEot8ByO4WZ+VYRMVk+9GuiTesNnYm0X2nj+n9l WHVYv7n+n/Z4HuJI5Bea2OLg71/lT8AGCQgllAlaQcWQFcgWzIcJdkXX3XXnV1LTf1iz TK5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687799639; x=1690391639; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=rm5U58cD44+DDKBRtN3VxAo0yyecspa336dzUa4UwTo=; b=ibZwpCSFXMR71rC2pw3tArOCPL0HOl6u3puxQSGoE3SW6B5ykY/YefxT3WAyr72eTH 8Yiy9QnJRdN1GX8Rt5rbtlOc5++iu3iVDq/EKI8pAVmJ6SLKLMNWcmCu6iFuQcN2PDjd EdEdFqSCE8XgP+Hr6BJ43B11pNT3bZova+YaGPwnFFMTl/KkXRHEiAVsecy8jL7gmBSl kxviFElI8XN9Ul78WXK4CpzMNr9cVMVA1yNUCF9uJG/nKOudxLuIX5sTCiBqKX+UVuhQ KaExyhd1Xka1TQYweB5B20KBCT0mDCK1W94xgVVeif4gsOiBBP6CppLAVfU5JQ5VI87V D8kw== X-Gm-Message-State: AC+VfDy5W/tktz5p38HsR0Vf+9QkozJBHbnGwOFWSeSd7W/pQthChhva yZueT/sVxF9NZfNbmA/Ewu0= X-Google-Smtp-Source: ACHHUZ7JmVx1FatMFel0fO+FJBp6+hDCsBp0wVFJcm3h+43QEylImVo9l2iKh7YSuk/loqj1b4H6tQ== X-Received: by 2002:a17:903:228c:b0:1b3:e6ba:1575 with SMTP id b12-20020a170903228c00b001b3e6ba1575mr4788858plh.16.1687799639142; Mon, 26 Jun 2023 10:13:59 -0700 (PDT) Received: from google.com ([2620:15c:211:201:9abd:c54f:4c3a:e10a]) by smtp.gmail.com with ESMTPSA id f1-20020a170902ab8100b001b80b428d4bsm1662026plr.67.2023.06.26.10.13.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jun 2023 10:13:58 -0700 (PDT) Sender: Minchan Kim Date: Mon, 26 Jun 2023 10:13:56 -0700 From: Minchan Kim To: Sergey Senozhatsky Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv2 2/3] zsmalloc: move migration destination zspage inuse check Message-ID: References: <20230624053120.643409-1-senozhatsky@chromium.org> <20230624053120.643409-3-senozhatsky@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230624053120.643409-3-senozhatsky@chromium.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jun 24, 2023 at 02:12:15PM +0900, Sergey Senozhatsky wrote: > Destination zspage fullness check need to be done after > zs_object_copy() because that's where source and destination > zspages fullness change. Checking destination zspage fullness > before zs_object_copy() may cause migration to loop through > source zspage sub-pages scanning for allocate objects just to > find out at the end that the destination zspage is full. > > Signed-off-by: Sergey Senozhatsky Acked-by: Minchan Kim