From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f197.google.com (mail-pf0-f197.google.com [209.85.192.197]) by kanga.kvack.org (Postfix) with ESMTP id 310B56B0275 for ; Wed, 26 Oct 2016 03:36:29 -0400 (EDT) Received: by mail-pf0-f197.google.com with SMTP id i85so149519305pfa.5 for ; Wed, 26 Oct 2016 00:36:29 -0700 (PDT) Received: from bombadil.infradead.org (bombadil.infradead.org. [2001:1868:205::9]) by mx.google.com with ESMTPS id q9si1165657pgc.165.2016.10.26.00.36.28 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Oct 2016 00:36:28 -0700 (PDT) Date: Wed, 26 Oct 2016 00:36:19 -0700 From: Christoph Hellwig Subject: Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if huge page cache enabled Message-ID: <20161026073619.GB1128@infradead.org> References: <20161025001342.76126-1-kirill.shutemov@linux.intel.com> <20161025001342.76126-19-kirill.shutemov@linux.intel.com> <20161025072122.GA21708@infradead.org> <20161025125431.GA22787@node.shutemov.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Andreas Dilger Cc: "Kirill A. Shutemov" , Christoph Hellwig , "Kirill A. Shutemov" , Theodore Ts'o , Andreas Dilger , Jan Kara , Andrew Morton , Alexander Viro , Hugh Dickins , Andrea Arcangeli , Dave Hansen , Vlastimil Babka , Matthew Wilcox , Ross Zwisler , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org On Tue, Oct 25, 2016 at 10:13:13PM -0600, Andreas Dilger wrote: > Why wouldn't you have all the pool sizes in between? Definitely 1MB has > been too small already for high-bandwidth IO. I wouldn't mind BIOs up to > 4MB or larger since most high-end RAID hardware does best with 4MB IOs. I/O sizes are not limited by the bio size, we can already support larger than 1MB I/O for a long time. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org