From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754170AbbKBRwc (ORCPT ); Mon, 2 Nov 2015 12:52:32 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39083 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752246AbbKBRwa (ORCPT ); Mon, 2 Nov 2015 12:52:30 -0500 From: Jeff Moyer To: Jan Kara Cc: Jens Axboe , LKML Subject: Re: Flush requests not going through IO scheduler References: <20151102122009.GE13433@quack.suse.cz> X-PGP-KeyID: 1F78E1B4 X-PGP-CertKey: F6FE 280D 8293 F72C 65FD 5A58 1FF8 A7CA 1F78 E1B4 X-PCLoadLetter: What the f**k does that mean? Date: Mon, 02 Nov 2015 12:52:26 -0500 In-Reply-To: <20151102122009.GE13433@quack.suse.cz> (Jan Kara's message of "Mon, 2 Nov 2015 13:20:09 +0100") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Jan Kara writes: > Hello, > > when looking into a performance issue, I've noticed one interesting thing > in blktrace data: Hi Jan, Do you have a reproducer I can run? Thanks, Jeff