From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-f53.google.com (mail-la0-f53.google.com [209.85.215.53]) by kanga.kvack.org (Postfix) with ESMTP id 197AE6B009A for ; Tue, 4 Nov 2014 02:27:21 -0500 (EST) Received: by mail-la0-f53.google.com with SMTP id mc6so346793lab.40 for ; Mon, 03 Nov 2014 23:27:20 -0800 (PST) Received: from tux-cave.hellug.gr (tux-cave.hellug.gr. [195.134.99.74]) by mx.google.com with ESMTPS id lm8si36209142lac.7.2014.11.03.23.27.19 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 03 Nov 2014 23:27:19 -0800 (PST) From: "P. Christeas" Subject: Early test: hangs in mm/compact.c w. Linus's 12d7aacab56e9ef185c Date: Tue, 04 Nov 2014 09:26:57 +0200 Message-ID: <12996532.NCRhVKzS9J@xorhgos3.pefnos> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Joonsoo Kim , Vlastimil Babka TL;DR: I'm testing Linus's 3.18-rcX in my desktop (x86_64, full load), experiencing mm races about every day. Current -rc starves the canary of stablity Will keep testing (should I try some -mm tree, please? ) , provide you feedback about the issue. Not an active kernel-developer. Long: Since 26 Oct. upgraded my everything-on-it laptop to new distro (systemd - based, all new glibc etc.) and switched from 3.17 to 3.18-pre . First time in years, kernel got unstable. This machine is occasionaly under heavy load, doing I/O and serving random desktop applications. (machine is Intel x86_64, dual core, mechanical SATA disk). Now, I have a race about once a day, have narrowed them down (guess) to: [] preempt_schedule_irq+0x3c/0x59 [] retint_kernel+0x20/0x30 [] ? __zone_watermark_ok+0x77/0x85 [] zone_watermark_ok+0x1a/0x1c [] compact_zone+0x215/0x4b2 [] compact_zone_order+0x4c/0x5f [] try_to_compact_pages+0xc4/0x1e8 [] __alloc_pages_direct_compact+0x61/0x1bf [] __alloc_pages_nodemask+0x409/0x799 [] new_slab+0x5f/0x21c ... Sometimes is a less critical process, that I can safely kill, otherwise I have to drop everything and reboot. Unless you are already aware of this case, please accept this feedback. I'm pulling from Linus, should I also try some of your trees for an early solution? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org