From owner-freebsd-wireless@freebsd.org Sun May 6 16:44:32 2018 Return-Path: Delivered-To: freebsd-wireless@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 24FEAFC07C9 for ; Sun, 6 May 2018 16:44:32 +0000 (UTC) (envelope-from pete@nomadlogic.org) Received: from vps-mail.nomadlogic.org (mail.nomadlogic.org [IPv6:2607:f2f8:a098::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 8DB8E84B90 for ; Sun, 6 May 2018 16:44:31 +0000 (UTC) (envelope-from pete@nomadlogic.org) Received: from [192.168.2.9] (cpe-23-243-163-13.socal.res.rr.com [23.243.163.13]) by vps-mail.nomadlogic.org (OpenSMTPD) with ESMTPSA id 04e141d8 TLS version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO for ; Sun, 6 May 2018 09:44:29 -0700 (PDT) To: "freebsd-wireless@freebsd.org" From: Pete Wright Subject: exception with iwm (intel 8260) under CURRENT Message-ID: <46a2b120-1410-df26-de85-f72ffb9cfef6@nomadlogic.org> Date: Sun, 6 May 2018 09:44:28 -0700 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 May 2018 16:44:32 -0000 howdy - just updated my current workstation yesterday and while the wireless interface is working i noticed several of these exceptions while the device was being brought up: bus_dma_tag_create with the following non-sleepable locks held: exclusive sleep mutex iwm0 (network driver) r = 0 (0xfffffe00a5b6c010) locked @ /usr/home/pete/git/freebsd/sys/dev/iwm/if_iwm.c:2889 stack backtrace: #0 0xffffffff80bd16a3 at witness_debugger+0x73 #1 0xffffffff80bd2a81 at witness_warn+0x461 #2 0xffffffff8119d32e at bus_dma_tag_create+0x7e #3 0xffffffff83151fd4 at iwm_dma_contig_alloc+0x64 #4 0xffffffff83155823 at iwm_save_fw_paging+0x113 #5 0xffffffff8314f267 at iwm_mvm_load_ucode_wait_alive+0x1247 #6 0xffffffff83150f8a at iwm_init_hw+0x9a #7 0xffffffff8315144f at iwm_init+0x2f #8 0xffffffff8314de66 at iwm_parent+0x46 #9 0xffffffff80bc44ac at taskqueue_run_locked+0x14c #10 0xffffffff80bc5278 at taskqueue_thread_loop+0x88 #11 0xffffffff80b2b174 at fork_exit+0x84 #12 0xffffffff8100bede at fork_trampoline+0xe here's the output of the device from pciconf: iwm0@pci0:1:0:0:    class=0x028000 card=0x00108086 chip=0x24f38086 rev=0x3a hdr=0x00     vendor     = 'Intel Corporation'     device     = 'Wireless 8260'     class      = network not sure if this is a known issue or not. if its new i can file a PR, let me know. cheers, -pete -- Pete Wright pete@nomadlogic.org @nomadlogicLA