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 5B3F021CC5A; Wed, 22 Apr 2026 06:07:36 +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=1776838062; cv=none; b=Milqlp+s/Lo1ZnsjE5v5kd8CYiAUhElbddZMnRLT/E3OnkgDHfb5EyjBK3flVLOgPuSzyQUlL6vcKZ9C9hoTN/6PDvsCR2rTQ7URbPZ+5hT663Y2zqgMP3YAGKZjyLApvU+vXMYpPbLdMFlMSNOE6dZmW7Y/dVjJAZq38zPPvHM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776838062; c=relaxed/simple; bh=eZAAR7hEYpuwaQzLXAYTbwmDH0yw7Rm1IzUXCwIBshw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QKkqwoV7eQZsU+N1tpun/SQI0AgM8z+T93JvnL/Cu9DbTr6/qL00c0cWSZjsAWRRMBbhI1MQ0BlfMDhKPYKuDsXrc3GShvWCdlT6j8za2rx7hGuHJxJeOz2m6h9vM13v5N1GZfiOikdr8DHn1V5RmEwOdSFxsLbYC3BRT+xK7Ks= 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=mhQQAfKH; 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="mhQQAfKH" 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=iMW8Vx62O/6nF3nfk6vYcn+eHtMGo9C8VQwZfMzOmSE=; b=mhQQAfKH8wq6MdiElxLqzE+Grp 5N8rUZoz/v5Ad4W+KwXlBCbOqnKpP3GMR3VmbXI1gRczQIYGeIrziKkQ5qd6LFYa5urpf4o1Z/i1i w5XCkns9AfiRIlEhTa40BVc80ghInlGlWpYSAvlQxa8+zRUjwQfCfwBagKynbTNYsU/RYbqjS4Mpo 1hZSCl6G5FP/2UR3x1zkIAbsvxuZ+TNnmJHNNmgdtgtXNPHbcsKCOTpZmRWgt4M4W0RE8zndZQZVr 9CGbdfSYhgIOg/TIX1KhQugVpPFEWjsOFMQL48VTDosr/0QOb/Eu0AGuAnZUs7B0UQjqJLpYxyip/ ZZsxOZ9g==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1wFQkD-00000009e5R-3tOZ; Wed, 22 Apr 2026 06:07:29 +0000 Date: Tue, 21 Apr 2026 23:07:29 -0700 From: Christoph Hellwig To: Matthew Wilcox Cc: Andrew Morton , Salvatore Dipietro , linux-kernel@vger.kernel.org, ritesh.list@gmail.com, abuehaze@amazon.com, alisaidi@amazon.com, blakgeof@amazon.com, brauner@kernel.org, dipietro.salvatore@gmail.com, djwong@kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, stable@vger.kernel.org, Jan Kara Subject: Re: [PATCH v2] mm/filemap: avoid costly reclaim for high-order folio allocations Message-ID: References: <20260420161404.642-1-dipiets@amazon.it> <20260420095106.86ecdb685cd31e0847362512@linux-foundation.org> Precedence: bulk X-Mailing-List: linux-fsdevel@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: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Mon, Apr 20, 2026 at 07:41:03PM +0100, Matthew Wilcox wrote: > > 5d8edfb900d5 came with no performance testing results. Does anyone > > have any evidence that it improved anything? By how much? > > Christoph reported it doubled write performance with NFS once NFS was > converted to use it. For the right workloads the same is true for local file systems.