From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nick Piggin Subject: partially uptodate page reads Date: Fri, 25 Jul 2008 01:17:11 +1000 Message-ID: <200807250117.11331.nickpiggin@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: hifumi.hisashi@oss.ntt.co.jp, jack@ucw.cz, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org Return-path: Content-Disposition: inline Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Hi, I have some questions about your patch in -mm vfs-pagecache-usage-optimization-onpagesize=blocksize-environment.patch I have no particular problem with something like this, but leaving the implementation details aside for the moment, can we discuss the justification for this? Are there significant numbers of people using block size < page size in situations where performance is important and significantly improved by this patch? Can you give any performance numbers to illustrate perhaps? Thanks, Nick