From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:55146 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725797AbeLDS3w (ORCPT ); Tue, 4 Dec 2018 13:29:52 -0500 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ACB4F2C33F for ; Tue, 4 Dec 2018 18:29:51 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: linux-ext4@vger.kernel.org Subject: [Bug 201685] ext4 file system corruption Date: Tue, 04 Dec 2018 18:29:49 +0000 Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-ext4-owner@vger.kernel.org List-ID: https://bugzilla.kernel.org/show_bug.cgi?id=201685 --- Comment #229 from Jens Axboe (axboe@kernel.dk) --- (In reply to Guenter Roeck from comment #228) > I guess I should have been more specific. With CONFIG_SCSI_MQ_DEFAULT=y (or > scsi_mod.use_blk_mq=1), cfq is not available. That applies to any kernel > version with CONFIG_SCSI_MQ_DEFAULT=y (or scsi_mod.use_blk_mq=1), not just > to 4.19, and it doesn't apply to 4.19 if CONFIG_SCSI_MQ_DEFAULT=n (or > scsi_mod.use_blk_mq=0). > > It is quite irrelevant if other schedulers are available if > CONFIG_SCSI_MQ_DEFAULT=y (or scsi_mod.use_blk_mq=1). cfq is not available, > and it doesn't matter if it is set as default or not. > > I hope this is specific enough this time. My apologies if I missed some > other means to enable or disable blk_mq. My clarification was for Steven, not you. In terms of scheduler, CFQ will change the patterns a lot. For the non-mq case, I'd recommend using noop or deadline for testing, otherwise I fear we're testing a lot more than mq vs non-mq. -- You are receiving this mail because: You are watching the assignee of the bug.