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[64.147.123.21]) by mx.google.com with ESMTPS id x58si10289028eda.238.2019.07.15.03.32.39 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 15 Jul 2019 03:32:39 -0700 (PDT) Received-SPF: pass (google.com: domain of dave@znu.io designates 64.147.123.21 as permitted sender) client-ip=64.147.123.21; Authentication-Results: mx.google.com; dkim=pass header.i=@znu.io header.s=fm3 header.b=WHnkpWYr; dkim=pass header.i=@messagingengine.com header.s=fm3 header.b=uFlZFby4; spf=pass (google.com: domain of dave@znu.io designates 64.147.123.21 as permitted sender) smtp.mailfrom=dave@znu.io Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.west.internal (Postfix) with ESMTP id B8FB6614 for ; Mon, 15 Jul 2019 06:32:37 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute4.internal (MEProxy); Mon, 15 Jul 2019 06:32:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=znu.io; h=from :content-type:content-transfer-encoding:mime-version:subject :message-id:date:to; s=fm3; bh=/DQWAtAzrI7aDaSYC2MJMiC2D4zGrFgnx N050x2KZu0=; b=WHnkpWYrnrj31tmq2vghKsLAQKeM+3RChHMqxp5CDxfzHQV4V x3XPzTO7W/0VBdAIUfG1rbFlLVdjVt490v5e7uftGxyOKwFF9yPSI+6leYzNRlQh j4rF3hz6SEiDSyaov3w+QEAaV5T2RPtbMz8Gd8KPyL3YtIPie+RAeOYVwmLCuC7q BBbZGwI+T9ruTBmussPsBxO3LCKSu3YHua2ioYmUAnkgjK5P7jaTfXBZY0KN2Oq0 wICfvkWBu+k6Yvn6EeILtmI2z1OnTzZLM4e7QOUqMm/f3iHzEoTf9HPGrH60UYHt YMxzpX4bYyr2dW5SiP9wcxruo8L3QHfAVe4rw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=/DQWAt AzrI7aDaSYC2MJMiC2D4zGrFgnxN050x2KZu0=; b=uFlZFby4B/mfN9BQsV9+T8 jR+9oDrZeGpEEYroXLffPhNssLYw5iMRwbmVwP+cUV0FA4qkt8KAElOASZafraxT NmEX29wSVO7Lpj+xUEIL3yD4i9Ut86fxAlsdIXw9zQuQ2M+jFxgvFap5Fjq75I4U 8qTP3SrMsRz3Q9UzEA0MLgs+TXweIYcpAYGQRdbufTeKQfszChwpTfCvW07I0gL3 tkD+RyBIfLEwfQzclb1vMZQ8O18vAV0aVh/aM0Fc24OACxGO0eN6E0S7MdgmaHj8 MElww0/7L2+tCIG4+EaV9pexGmTq02h3/6pQMIMMuoGiSCYZh66pUxag7y4JTRtQ == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduvddrheekgddvjecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephfgtgfgguffkfffvofesthhqmhdthh dtvdenucfhrhhomhepffgrvhhiugcukggrrhiihigtkhhiuceouggrvhgvseiinhhurdhi oheqnecukfhppeehrdekkedrudeiuddrheelnecurfgrrhgrmhepmhgrihhlfhhrohhmpe gurghvvgesiihnuhdrihhonecuvehluhhsthgvrhfuihiivgeptd X-ME-Proxy: Received: from [192.168.100.145] (net-5-88-161-59.cust.vodafonedsl.it [5.88.161.59]) by mail.messagingengine.com (Postfix) with ESMTPA id BFEA080062 for ; Mon, 15 Jul 2019 06:32:36 -0400 (EDT) From: David Zarzycki Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: Transparent Huge pages hanging on 5.1.x/5.2.0 kernels? Message-Id: Date: Mon, 15 Jul 2019 12:32:34 +0200 To: linux-mm@kvack.org X-Mailer: Apple Mail (2.3445.104.11) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, In the last few weeks, one of my build boxes started hanging at the end = of a build with a zombie ld.lld process stuck in the kernel: [97199.634549] CPU: 14 PID: 72214 Comm: ld.lld Kdump: loaded Not tainted = 5.2.0-1.fc31.x86_64 #1 [97199.634550] Hardware name: Supermicro SYS-5038K-i-NF9/K1SPE, BIOS = 1.0b 04/13/2017 [97199.634551] RIP: 0010:compact_zone+0x4d0/0xce0 [97199.634553] Code: 41 c6 47 78 01 e9 52 fc ff ff 4c 89 f7 48 89 ea 4c = 89 e6 e8 22 8e 02 00 49 89 c6 e9 d7 fd ff ff 8b 4c 24 10 4c 89 e2 4c 89 = ee <4c> 89 ff e8 e8 e0 ff ff 49 89 c4 48 85 c0 0f 84 bd fe ff ff 45 8b [97199.634555] RSP: 0018:ffffac6a53c879c0 EFLAGS: 00000202 [97199.634557] RAX: 0000000000000001 RBX: 000000000619f200 RCX: = 000000000000000c [97199.634558] RDX: 000000000619f000 RSI: 000000000619ee20 RDI: = ffff95f77ffc8330 [97199.634559] RBP: ffff95fb7ffd4d00 R08: 0000000000000007 R09: = 000000000619f000 [97199.634561] R10: 0000000000000000 R11: 0000000000000003 R12: = 000000000619f000 [97199.634562] R13: 000000000619ee20 R14: fffffb58467b8000 R15: = ffffac6a53c87a90 [97199.634563] FS: 00007ffff10fd700(0000) GS:ffff95f5fb780000(0000) = knlGS:0000000000000000 [97199.634566] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [97199.634567] CR2: 00007fff08001378 CR3: 00000054737f6000 CR4: = 00000000001406e0 [97199.634568] Call Trace: [97199.634569] compact_zone_order+0xde/0x140 [97199.634570] try_to_compact_pages+0xcc/0x2a0 [97199.634570] __alloc_pages_direct_compact+0x8c/0x170 [97199.634571] __alloc_pages_slowpath+0x248/0xdf0 [97199.634572] ? get_vtime_delta+0x13/0xe0 [97199.634573] ? finish_task_switch+0x12f/0x2a0 [97199.634574] __alloc_pages_nodemask+0x2f2/0x340 [97199.634575] do_huge_pmd_anonymous_page+0x130/0x910 [97199.634576] __handle_mm_fault+0xfd7/0x1ac0 [97199.634577] handle_mm_fault+0xc4/0x1f0 [97199.634577] do_user_addr_fault+0x1f6/0x450 [97199.634578] do_page_fault+0x33/0x120 [97199.634579] ? page_fault+0x8/0x30 [97199.634580] page_fault+0x1e/0x30 This bug seems to go away if I comment out the following lines from my = boot script: # echo always > /sys/kernel/mm/transparent_hugepage/enabled # echo always > /sys/kernel/mm/transparent_hugepage/defrag What can I do to debug this further? Dave