From owner-freebsd-current@freebsd.org Sun Aug 9 22:19:42 2020 Return-Path: Delivered-To: freebsd-current@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 782513BF222 for ; Sun, 9 Aug 2020 22:19:42 +0000 (UTC) (envelope-from a13xlevy@gmail.com) Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BPtn94PX9z4STn for ; Sun, 9 Aug 2020 22:19:41 +0000 (UTC) (envelope-from a13xlevy@gmail.com) Received: by mail-wr1-x42a.google.com with SMTP id p20so6457306wrf.0 for ; Sun, 09 Aug 2020 15:19:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=kZjsfE8kXEd36MuJlb+ciFy1dzqjAO+aDcUKHqCbaEM=; b=N/5xNU0iC3vRClRZuyGCE3RcPRsH9kwx5fYWPJLSUm0yib6mKmRTTs5RSH53JACcR6 nWOz0an3diyNakdd/+gOswocrz5HAu/v89QsMxC3BlSwDB3MGAhnHIwREGpDyEK8HiPv r2f/F3qcTrnYfUr2VDHGQdYYYufZlNjzbOsnwV0dC8ThkMta4vcPZG3YZaItK7iXDXd6 6iPI7A89rv5qBE47Nbgjaya60KEstqjfnfZjcpQ6rEhHLOr49Bo4oeBmt8kcU31YDLZh djtXQoTzAqKUoB5pM6hNUUp8FW3M2k/O8VnR76ANuaWx6Y0SBJTNC3ei7fZu3n8R1SeX 2Elg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=kZjsfE8kXEd36MuJlb+ciFy1dzqjAO+aDcUKHqCbaEM=; b=Dm9gP71C1BzgGUN0rPQlhBNqRYErdVVheR4LNSCbQqc/C9tIva45m92OKQpC0ALaHu Tmq7JIKn/AlXUf+uPWRhy8MFKndNjeDjRdOwNJuemHo6oT1gAByhQXmxQSMvl6EXGey3 MKGIu2WYAZ37rBKL3PyugRmpPF6fgAh/VnaeREBQXxHmoOVU6QxBvpId4M47nuRf91Qf SUePnNqOcv6GO6iYf/XJ40cYRjznGLEpHvtbmSU9EvGxRsBYVGsSwEw8NtSe29tn5k+N Ta2cBwbb+y7traIqN0ZABg4ZBPgqOLBrPA5J8fVHQ2yR6kv0AV3inQz6aJ9C7AowmnUc ZGOQ== X-Gm-Message-State: AOAM531h7Kp55XP5uZiPzFTtop9rdomsucJa66IBIt6yNWKPJUltNvUR p9MYTHhmLBVPguu5/mSY6FArM+eP7n9WzBanLlHOovg4MJQ= X-Google-Smtp-Source: ABdhPJwVgKzhq2wp6EDkSwKjHSxPGsISfdWqIP+cJ/udrVedCERTOOTDMM3X5a0AgrhYzErp9wOwrnFKvTp5z94H+GE= X-Received: by 2002:adf:f3cc:: with SMTP id g12mr9976948wrp.412.1597011578290; Sun, 09 Aug 2020 15:19:38 -0700 (PDT) MIME-Version: 1.0 From: Alexandre Levy Date: Sun, 9 Aug 2020 23:19:26 +0100 Message-ID: Subject: Kernel crash during video transcoding To: freebsd-current@freebsd.org X-Rspamd-Queue-Id: 4BPtn94PX9z4STn X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=N/5xNU0i; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of a13xlevy@gmail.com designates 2a00:1450:4864:20::42a as permitted sender) smtp.mailfrom=a13xlevy@gmail.com X-Spamd-Result: default: False [-3.07 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.08)[-1.077]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-0.97)[-0.968]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::42a:from]; NEURAL_HAM_SHORT(-0.02)[-0.022]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.33 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Aug 2020 22:19:42 -0000 Hi, I installed the port drm-devel-kmod for Plex to be able to transcode videos using the integrated GPU of my Intel Celeron G5900. I'm running r364031 and the kernel is compiled with GENERIC-NODEBUG profile. Transcoding has been working fine for quite a while now but one video transcoding is causing a kernel panic that is reproducible all the time with that particular video. It seems like it's caused by the i915kms module (call of i915_gms_fault() in the stack) : Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0xdf fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff80bdd2b4 stack pointer = 0x0:0xfffffe00d2be56d0 frame pointer = 0x0:0xfffffe00d2be56d0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 4611 (Plex Transcoder) trap number = 12 panic: page fault cpuid = 0 time = 1596976796 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00d2be5390 vpanic() at vpanic+0x182/frame 0xfffffe00d2be53e0 panic() at panic+0x43/frame 0xfffffe00d2be5440 trap_fatal() at trap_fatal+0x387/frame 0xfffffe00d2be54a0 trap_pfault() at trap_pfault+0x4f/frame 0xfffffe00d2be54f0 trap() at trap+0x271/frame 0xfffffe00d2be5600 calltrap() at calltrap+0x8/frame 0xfffffe00d2be5600 --- trap 0xc, rip = 0xffffffff80bdd2b4, rsp = 0xfffffe00d2be56d0, rbp = 0xfffffe00d2be56d0 --- _rw_wowned() at _rw_wowned+0x4/frame 0xfffffe00d2be56d0 vm_page_busy_acquire() at vm_page_busy_acquire+0x141/frame 0xfffffe00d2be5710 remap_io_mapping() at remap_io_mapping+0x120/frame 0xfffffe00d2be5760 i915_gem_fault() at i915_gem_fault+0x25f/frame 0xfffffe00d2be57d0 linux_cdev_pager_populate() at linux_cdev_pager_populate+0x11b/frame 0xfffffe00d2be5840 vm_fault() at vm_fault+0x3d1/frame 0xfffffe00d2be5950 vm_fault_trap() at vm_fault_trap+0x60/frame 0xfffffe00d2be5990 trap_pfault() at trap_pfault+0x19c/frame 0xfffffe00d2be59e0 trap() at trap+0x3f1/frame 0xfffffe00d2be5af0 calltrap() at calltrap+0x8/frame 0xfffffe00d2be5af0 --- trap 0xc, rip = 0x80296659a, rsp = 0x7fffffffbd38, rbp = 0x80fc00000 --- KDB: enter: panic I don't see any crash dump in /var/crash despite having the right configuration and I should have enough space on my swap device (128GB USB drive) : $ cat /etc/rc.conf | grep dump dumpdev="AUTO" $ swapinfo Device 1K-blocks Used Avail Capacity /dev/gpt/crash0 121307096 0 121307096 0% $ cat /etc/fstab /dev/gpt/crash0 none swap sw 0 0 $ dumpon -l gpt/crash0 Not sure why no dump was generated, is it because the kernel was compiled with the GENERIC-NODEBUG profile ? However I see various KDB options in the GENERIC profile that are inherited by GENERIC-NODEBUG. Happy to recompile the kernel with GENERIC profile if it's required. Thank you.