From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Moyer Subject: question: should io_is_direct really return true for DAX inodes? Date: Thu, 29 Oct 2015 10:32:45 -0400 Message-ID: Mime-Version: 1.0 Content-Type: text/plain Cc: linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org, Dave Chinner To: "dan j. williams" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:46866 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757347AbbJ2Ocq (ORCPT ); Thu, 29 Oct 2015 10:32:46 -0400 Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Hi, I'm concerned that applications that used to run out of page cache will experience a performance degradation when being forced into doing I/O directly to the backing store. What do others think? Cheers, Jeff