From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out162-62-58-216.mail.qq.com (out162-62-58-216.mail.qq.com [162.62.58.216]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 503723783B4; Sun, 31 May 2026 12:37:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=162.62.58.216 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780231030; cv=none; b=cmRYhK5LP3qdeIwX0/v1bcVwDQ+d4uIwyWv3PVyVdjzZqHOrYWMIl5ea9Df1R6+qhwgNhmlquMpwYlMimjqlG9HdMCc5iGt+FFb19XD8GGH0UGT0uPib/cvvz54Mt8eFARVJGwxLa1besHOeTaTGgHTdNy4qENsBhb7UT27AuZQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780231030; c=relaxed/simple; bh=6GFEQOnqt7UcN9zu/fzXfxBvTaMcQB4DqFXj4kqVO70=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=o81EtkqU9Di/27z7SPdM8C7egpI5Fh1r0cQzSDlUGxkhu4q+TPYLmjsdzCQsOT5lslkKQGa+1UwkoVwTWJx2YMq/y8EHJIVmEnyZ4aFyk2HM2UcAxg0omdRy6dUuwjQckxmPz3Ovp4U302w7iV6Rwkru1Lo2BNdmDNIJxCnHA2c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=H91FdTyO; arc=none smtp.client-ip=162.62.58.216 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="H91FdTyO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1780231023; bh=HL+wohryqOhpKGEyagy/lOHeWmop01YnUKtre6cBpa4=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=H91FdTyONTHJgIAbaZiumO3bQt+mOJZmCIzauEVd5mnirUtqBTKKHNXeW26psSaJL a8d1GiBOLRz2pjLT5IvZtGDKE7TpUHI9bQkqSjHdeMEKlvCmt71RwrNoKQTXku/39g P+cDSWA8xMvkZnmEnvjv5fIxJD+ZhSIh0I80a938= Received: from [10.24.9.42] ([123.112.11.230]) by newxmesmtplogicsvrszc50-0.qq.com (NewEsmtp) with SMTP id 88587460; Sun, 31 May 2026 20:34:05 +0800 X-QQ-mid: xmsmtpt1780230845t6jodq04y Message-ID: X-QQ-XMAILINFO: MpYZqmNm/7vMmnst/jX7M/5lIu0zok5pcX9bgbd/L55BNRONuZnTr8CFF7x+hi Lm8Pc6o+SnwpYTDFwgAUG3KGyLgs07kCNt3JeGgJh8HSSm2htgO5UwIEfhD9/OpmrqcvfI6YwpHH yS8sSrdIok2pzZhn2eGrHuNTbqhFaDKm+XHadLsKV8KoXE4cZqfiaPEnQXIGoRDTuu/OfjdQI7eR iCz6VW92AA25Rq6zpg7e5E50Ip7qtcRrak/13rWOG90s2I73dK2KTJ/LdDV6avtMfVzEdlSpf6Lq Vb/KbDAVuggLvjLkCucUWzTL1GeE4wbkcnOQCpoxlL3bfYJWynDftEwQ9iPkJQe18bfCNLSO9U0D 8uCyyfay/mOr1ms3Giv7DNGyRag8dehwGeci7erd+R4tJpMWrAtgCvp7V/z56Fvp5ML18vwKulc5 7+isBuSeeNmymq4jzMdJm4WNUFh05jyKXNNL3c3c3cxE21vn6Jvq3vJ1dK1TKivm/l7D7zpS5jmk +iXN0FfFlWP1HBts7x43JyjgKR3XHodb4MFTRDGttRpK0tkJV7tVz26lOwdbAtAF74Oelm//ObEd GsBOI70by6vm+WZlqnD14CnlfWGn8/Klc+2F+H4VqCPFErxDR9/YUvGd9Mfw/AgRS0LT41bnosnh JDW5f29TY70mAqdP/933Gbaxyny0dwDyKZQg0k12lGmvUEqtn+3pgyYRSQiC/pqAkA4OmISl/Xrs 0BKnbWpxQRUVU5WcCWZkY4ikC4J/bkNCkUXpZcVYm20PEXdcTkYr70LMo1hGoDImVA8ag+znDSHF 3Br2z2IwOVHpCJIFKMAWrPSlGpTdjnDw9YVocGAHgx5n4xRE6/0dumHk7O4j+wfkDiwtqhi+KBJs BZuw7XZ6Y1Ei0kFPhti54DHQcxFNH6zwvsTXTckqQCnDyn2F95w5YeoLuFBdAy9QQrq3MJHcn+HL U0fMaFsTEoMfpFOg5P4zdWtUw9DfNQmQBJrViqtqSfjzw49QsJ54CKUILaO8t7kUb3RMyqHZXJAM gpM2KTJy7zj+FTDA/NwvqnQZ5qWUaXKNbjgt6noLGLo/gje1MiwKGsifBCBnRPY1QbNstzt9BIYn Cux1llYlj7+C4jvq/vkTJbL+FNy3TliHAvzriFrBY4YeghhB04c5T1bBPxpw== X-QQ-XMRINFO: Mp0Kj//9VHAxzExpfF+O8yhSrljjwrznVg== X-OQ-MSGID: Date: Sun, 31 May 2026 20:34:05 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v2 4/9] mm: admit large swapin by backend range in swapin_sync() To: Kairui Song Cc: Andrew Morton , linux-mm@kvack.org, Alexandre Ghiti , Usama Arif , Chris Li , Johannes Weiner , Yosry Ahmed , Nhat Pham , David Hildenbrand , Hugh Dickins , Roman Gushchin , Shakeel Butt , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org References: From: Fujunjie In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 5/29/2026 10:45 PM, Kairui Song wrote: > On Fri, May 29, 2026 at 10:43 PM Kairui Song wrote: >> >> Hi Fujunjie, >> >> Thanks for the update, but this whole defer_memcg1_swapin thing is so >> ugly I don't think this is the right way at all. >> >> If you really need this, maybe you can always defer the memcg1 > > Oh and I'm not saying I'm against this series or the idea, I'm just > saying this particular design of this one patch needs some improvement > :) Thanks for your review! I will improve the implementation.