Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752836AbdHVXC2 (ORCPT ); Tue, 22 Aug 2017 19:02:28 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:50708 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752742AbdHVXC1 (ORCPT ); Tue, 22 Aug 2017 19:02:27 -0400 X-IronPort-AV: E=Sophos;i="5.41,414,1498492800"; d="scan'208";a="44356365" From: Bart Van Assche To: Andrew Morton Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Bart Van Assche , Jens Axboe , Dmitry Vyukov , Akinobu Mita , Michal Hocko Subject: [PATCH v2 2/2] block: Make I/O timeout failure injection again task-independent Date: Tue, 22 Aug 2017 16:00:43 -0700 Message-Id: <20170822230043.9968-3-bart.vanassche@wdc.com> X-Mailer: git-send-email 2.14.0 In-Reply-To: <20170822230043.9968-1-bart.vanassche@wdc.com> References: <20170822230043.9968-1-bart.vanassche@wdc.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1762 Lines: 49 Commit e41d58185f14 made all faults that are triggered from task context, including I/O timeouts, dependent on the failure injection settings for that task. Make it again possible to inject I/O timeout failures independent of task context. An example for a fault injection for which this patch makes a difference (from a VM booted with the 'threadirqs' command line parameter): FAULT_INJECTION: forcing a failure. name fail_io_timeout, interval 1, probability 100, space 0, times 1 CPU: 6 PID: 1253 Comm: irq/36-skd0-msi Not tainted 4.13.0-rc2-dbg+ #5 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1.fc26 04/01/2014 Call Trace: dump_stack+0x8e/0xcd should_fail+0x154/0x160 blk_should_fake_timeout+0x27/0x30 blk_mq_complete_request+0x11/0x30 skd_end_request+0x32/0xc0 [skd] skd_isr_completion_posted.isra.30+0x14a/0x400 [skd] skd_comp_q+0x40/0xb0 [skd] irq_forced_thread_fn+0x2a/0x70 irq_thread+0x144/0x1a0 kthread+0x125/0x140 ret_from_fork+0x2a/0x40 Fixes: commit e41d58185f14 ("fault-inject: support systematic fault injection") Signed-off-by: Bart Van Assche Cc: Jens Axboe Cc: Dmitry Vyukov Cc: Akinobu Mita Cc: Michal Hocko Cc: Andrew Morton --- block/blk-timeout.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-timeout.c b/block/blk-timeout.c index 17ec83bb0900..2e92b20b125f 100644 --- a/block/blk-timeout.c +++ b/block/blk-timeout.c @@ -11,7 +11,7 @@ #ifdef CONFIG_FAIL_IO_TIMEOUT -static DECLARE_FAULT_ATTR(fail_io_timeout); +static DECLARE_GLOBAL_FAULT_ATTR(fail_io_timeout); static int __init setup_fail_io_timeout(char *str) { -- 2.14.0