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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AB4CBC98315 for ; Mon, 19 Jan 2026 02:34:42 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DB09E6B00E6; Sun, 18 Jan 2026 21:34:41 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D87DB6B00E7; Sun, 18 Jan 2026 21:34:41 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CB4206B00E8; Sun, 18 Jan 2026 21:34:41 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id BD5576B00E6 for ; Sun, 18 Jan 2026 21:34:41 -0500 (EST) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 529DF59363 for ; Mon, 19 Jan 2026 02:34:41 +0000 (UTC) X-FDA: 84347145162.30.8EECF37 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf25.hostedemail.com (Postfix) with ESMTP id CE7F5A0007 for ; Mon, 19 Jan 2026 02:34:39 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=ZKGhiebf; spf=pass (imf25.hostedemail.com: domain of akpm@linux-foundation.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1768790079; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=5pPsugx0wKQdM6AAg+KjCA8yYX0qEeWPKN2pW2ZYMEM=; b=mLrLxid+9uatuUV3fG5MDqN1zK4nFEI2y5P/gl+c3sWUPiZ6Hb8vsAsd7ZScFdJ6qYyBFd hKSFYhPCFEz5OvnWOZbyjNzOdTtTJ84aov1HvU9dCGo9sq7foknQmNBasaN7Nujk3tKi+0 klMYsKQNEsCJqltIqIZG62rCYB3h0XA= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1768790079; a=rsa-sha256; cv=none; b=l2qJ79eeswryRfzvpnyOLpOdX2vWJZnl8zwBykLX6SVCgTd4/Jdk1yXHW1SM5e8xUgMLKy ehOmKorDQ093mmYOjTrS/YzIAgaMsUNgCYbqwW+CcAZmuuCQUyRU3umWoZcNXw7iY0AFc8 i2C/3/6/OywcPjU5SXm9cDxTcsKSQ8k= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=ZKGhiebf; spf=pass (imf25.hostedemail.com: domain of akpm@linux-foundation.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 01CD660018; Mon, 19 Jan 2026 02:34:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 68ED4C116D0; Mon, 19 Jan 2026 02:34:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1768790078; bh=YVy/1y+q+QVasfuOK09hlzjhuU7NPNg3Wonyo/pdW/s=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=ZKGhiebfTjbjAZzdeRmF2R9ic4BcynR0XIZ3LeGjkdjM5rECcyFPeIdQZFRD/WQZ1 WF5lIJx1xVmKmmB5lEseKryywNtXQ3ZtBhMt9sAzh9f8sqEUrDpa4PwdYAT6XNpRi8 2gzvF6+uuF9z1WX77IvNBChBpauX6F0NIam0igDc= Date: Sun, 18 Jan 2026 18:34:37 -0800 From: Andrew Morton To: Sergey Senozhatsky Cc: Richard Chang , Minchan Kim , Brian Geffon , David Stevens , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org Subject: Re: [PATCHv2 0/7] zram: introduce compressed data writeback Message-Id: <20260118183437.6b11e6c43c7701759b73d22c@linux-foundation.org> In-Reply-To: <20251201094754.4149975-1-senozhatsky@chromium.org> References: <20251201094754.4149975-1-senozhatsky@chromium.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: CE7F5A0007 X-Rspam-User: X-Stat-Signature: 1cgnjabisreh3mfff6mh1g181yso9zgz X-HE-Tag: 1768790079-24506 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 1 Dec 2025 18:47:47 +0900 Sergey Senozhatsky wrote: > As writeback becomes more common there is another shortcoming > that needs to be addressed - compressed data writeback. Currently > zram does uncompressed data writeback which is not optimal due to > potential CPU and battery wastage. This series changes suboptimal > uncompressed writeback to a more optimal compressed data writeback. I'll move this series and the "zram: use u32 for entry ac_time tracking" series into mm-stable soon, but the review coverage is thin. It would be good to get some more reviewer input on these zram/zsmalloc changes. We haven't heard from Minchan for a couple of months. Is there someone else who can step up and help out? Thanks.