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 X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BCDB6C433DF for ; Fri, 16 Oct 2020 00:25:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59154207F7 for ; Fri, 16 Oct 2020 00:25:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ZyQbjNqS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731731AbgJPAZw (ORCPT ); Thu, 15 Oct 2020 20:25:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728114AbgJPAZv (ORCPT ); Thu, 15 Oct 2020 20:25:51 -0400 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5D39C061755 for ; Thu, 15 Oct 2020 17:25:51 -0700 (PDT) Received: by mail-pf1-x443.google.com with SMTP id f19so419168pfj.11 for ; Thu, 15 Oct 2020 17:25:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=/UxtsBGSGwNjzSj8yYCxj7NEqWqSlTd7zaXgi6xi2GM=; b=ZyQbjNqSLLeS0aTKY99f3gC+Sro9RcmWf/RnsJF+jiE4aBM+eqrZUBKN0spSxeIpYm KLJrsm+XZnC7VhAzM3GKHq4s2ZKh8E+lXXD+AwvH5vqbhMSrFhto76rgSDhzGiMrLiHE GnAoI5v0SdMx6AX/uIaNOMwpQj4DGal1Ftqu76rRkxXGD6hF73uLEzdPyQi6SIKUysDX NqPb6qNreaZ3Jcz+iQKFHcSZVohtoAP5xIf/X3Ee05OQxSVOQUQiQD7UVpwOP/mtBKyh tJ14RFPDMziXIkpG7vd1BP4Xk7foUrNcnezB950Z/1KOQSEgpvs0fRaz+umTj0T9UZqD JjBQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=/UxtsBGSGwNjzSj8yYCxj7NEqWqSlTd7zaXgi6xi2GM=; b=LGLIR13SKR9hn9YVRzF3KV8z+K1nzSB960TwqG7pLgYWX0CgGXqF8iuw8nWp0xHo/I Nb0TMLi0CYkkWIyw7Q7sd3D1wL+gyBRpA9gj3cqN7RFpJipKi99hmPwps7mM8w9nkLOy wKYUSxGXcyHQ+bPTkGtOq5kNuBewkEkajq5q3iRWnUfWzNdHYdwFDALledMfJujOQSkW 8Zy0wZ4pS7NNmPiMxkS8tszkUCXzA9ewTNVYljUc6P9GWRJNQ2Qo4z/YivoGSoyC7dvh AV33G22Coll1Pdu9kpCJEIWwy3tgX1koSgROZLmQHLlSkkx7hLeH0uEMLNz4LwP7VHA1 sF6A== X-Gm-Message-State: AOAM5329kvHOw5CH83CLtqlJnOx8MRko3sl2a1C49JEe3q8yrv3us3sg IJcuB31oXNuPESkGD8f86Dg= X-Google-Smtp-Source: ABdhPJz3tnzpr+xwKV4AdKcSgsGhigbeR44dtzhfZejNEB7xp0069Hy+kmO/EhVTWKnfMf+nmdSXIQ== X-Received: by 2002:a62:6dc3:0:b029:13c:1611:658d with SMTP id i186-20020a626dc30000b029013c1611658dmr1143294pfc.10.1602807951229; Thu, 15 Oct 2020 17:25:51 -0700 (PDT) Received: from localhost ([2401:fa00:8f:203:a6ae:11ff:fe11:4b46]) by smtp.gmail.com with ESMTPSA id c4sm515076pjq.7.2020.10.15.17.25.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Oct 2020 17:25:50 -0700 (PDT) Date: Fri, 16 Oct 2020 09:25:47 +0900 From: Sergey Senozhatsky To: Minchan Kim Cc: Andrew Morton , LKML , rajekumar@google.com, amosbianchi@google.com, joaodias@google.com, Sergey Senozhatsky Subject: Re: [PATCH] zram: support a page writeback Message-ID: <20201016002547.GA2412725@google.com> References: <20201012071452.1613131-1-minchan@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201012071452.1613131-1-minchan@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (20/10/12 00:14), Minchan Kim wrote: > > With the command, zram writeback idle pages from memory to the storage. > > +If admin want to write a specific page in zram device to backing device, > +they could write the page index into the interface. > + > + echo 1251 > /sys/block/zramX/writeback > + May be we can make it more explicit? echo "page_index=123" > /sys/block/zramX/writeback Just in case of future extensions. E.g. someone might want to have something like echo "idle_nr=123" > /sys/block/zramX/writeback which would write_back 123 idle pages max. -ss