From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 40A6C383C7A; Tue, 3 Mar 2026 14:10:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772547026; cv=none; b=TI0XRU5yX4NSZRsPMfC5l4XoocqIOlvf3GeLpquyaMTjx/5CJF5TsiRyVB84eOGmeIj4H1wIHNhVD1k8LpDfE6ubhMH+oebBT+m1NJZi5Zs+mwjc0rEZVOlYh1R/BnWs3ADRLvO/Ksmzuo2gwSuq/KWRF6eNcdQqj8I7BmU4N30= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772547026; c=relaxed/simple; bh=6QjPYj8PUmZMpbtQONXPFJKXrsZshrPIELsTsDvK0P4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=iFHYa3CsZVZmtQ+EWIzKTz1ualoEcm/XVFExHGttuGgJSe0bheMaCUMOtw0rHiS/pnplwU8/wv53yhPLSj3uNTXDsuDy6vKm8UdHdkhlbUFnoTPIi/psyZ3JJY8YUmhnApvFykXmwQpOC5taYaXHqQDL84j2BFSxcOt94RupgAQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=Mzf8zM8b; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Mzf8zM8b" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=a9u56EZ3PSfIb2btDXq4/JS3z6i9/jf+AUwQRPvsces=; b=Mzf8zM8b6LFOygmPYqODqdSM9e Tp9BXCcIo947iDR4+2TmKKK3BbGix8IyIB277AjxFH1u8jUvwxi2SDp3iEjHXK2/0u2GNXRQrfXmV lzkQ/lqP2x7DEcw4eigUo7yL6pyux0Bzy5ibhpKNxLVwtdUFuQk6bKwLAtfTAsLBw96AQ9iQuifl3 nTFmpV4yMywEPCs+BB4fbsm+1UM0zbdp4vCanMWq+Xx7QL2e9/b/CtdZjXxMqsOaA8Dj/v53MkgYD U5dES+gMZeAXhWT7BcpfbVvpAmTOK/925okF+7ySgncqEqszHZbCKcU1GfMrwASKH+ljRvFlu5ffU dyaoXHPA==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vxQRr-0000000FI4y-0fQd; Tue, 03 Mar 2026 14:10:07 +0000 Date: Tue, 3 Mar 2026 06:10:07 -0800 From: Christoph Hellwig To: Matt Fleming Cc: Andrew Morton , Jens Axboe , Minchan Kim , Sergey Senozhatsky , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel-team@cloudflare.com, Matt Fleming Subject: Re: [RFC PATCH 1/1] mm: Reduce direct reclaim stalls with RAM-backed swap Message-ID: References: <20260303115358.1323188-1-matt@readmodwrite.com> <20260303115358.1323188-2-matt@readmodwrite.com> 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-Disposition: inline In-Reply-To: <20260303115358.1323188-2-matt@readmodwrite.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html No way. Stop adding hacks to the block layer just because you're abusing a block driver for compressed swap. Please everyone direct their enegery to pluggable zwap backends and backing store less zswap now instead of making the zram mess even worse.