From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2CB77221275; Mon, 19 Jan 2026 02:34:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768790079; cv=none; b=urHokC6mkW46SD9DVkE9pveMTxbvn7WP3gpOEVKU+x2NdhHJwqA8mZuZ1EVIeTn+iC1zxNMQNHzhUeJjcAKsYZ5+aG7J6KrXdXSAik+5flC9+rNAdNar1drhFjWygQXJD2IoJ+GX+KU3woymLTC9ekHWQxYWijWgMQzghIMbbgM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768790079; c=relaxed/simple; bh=YVy/1y+q+QVasfuOK09hlzjhuU7NPNg3Wonyo/pdW/s=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=s2LAhpFJnpDPeGirYip1uZVK2pPpVMezYmuNV/r3nCTHz0icOpUKMv4uCjoB1d70iGovWcNIGzc6DXxq9lZCizBpn2rDPfriLaAYPNkeZmIkYCgjyrXyRLZNM9fscKiINONse0GUNp6lBVf5Gkl8IQLCkL+7Jq6x2m7u+p5IVJY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=ZKGhiebf; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="ZKGhiebf" 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) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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.