From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f42.google.com (mail-pa0-f42.google.com [209.85.220.42]) by kanga.kvack.org (Postfix) with ESMTP id 61FB36B006C for ; Thu, 4 Dec 2014 02:51:51 -0500 (EST) Received: by mail-pa0-f42.google.com with SMTP id et14so17569735pad.29 for ; Wed, 03 Dec 2014 23:51:51 -0800 (PST) Received: from ponies.io (ponies.io. [2600:3c01::f03c:91ff:fe6e:5e45]) by mx.google.com with ESMTP id mt1si41779592pbb.128.2014.12.03.23.51.49 for ; Wed, 03 Dec 2014 23:51:49 -0800 (PST) Received: from cucumber.localdomain (58-6-54-190.dyn.iinet.net.au [58.6.54.190]) by ponies.io (Postfix) with ESMTPSA id 0CE14A007 for ; Thu, 4 Dec 2014 07:51:48 +0000 (UTC) Date: Thu, 4 Dec 2014 18:51:46 +1100 From: Christian Marie Subject: Re: isolate_freepages_block and excessive CPU usage by OSD process Message-ID: <20141204075146.GA4961@cucumber.anchor.net.au> References: <20141123093348.GA16954@cucumber.anchor.net.au> <20141128080331.GD11802@js1304-P5Q-DELUXE> <54783FB7.4030502@suse.cz> <20141201083118.GB2499@js1304-P5Q-DELUXE> <20141202014724.GA22239@cucumber.bridge.anchor.net.au> <20141202045324.GC6268@js1304-P5Q-DELUXE> <20141202050608.GA11051@cucumber.bridge.anchor.net.au> <20141203075747.GB6276@js1304-P5Q-DELUXE> <20141204073045.GA2960@cucumber.anchor.net.au> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="PNTmBPCT7hxwcZjr" Content-Disposition: inline In-Reply-To: <20141204073045.GA2960@cucumber.anchor.net.au> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org --PNTmBPCT7hxwcZjr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline An extra note that may or may not be related, I just saw this whilst load testing: [177586.215195] swap_free: Unused swap offset entry 0000365b [177586.215224] BUG: Bad page map in process ceph-osd pte:006cb600 pmd:fea8a8067 [177586.215260] addr:00007f12dff8a000 vm_flags:00100077 anon_vma:ffff8807e6002000 mapping: (null) index:7f12dff8a [177586.215316] CPU: 22 PID: 48567 Comm: ceph-osd Tainted: GF B O-------------- 3.10.0-123.9.3.anchor.x86_64 #1 [177586.215318] Hardware name: Dell Inc. PowerEdge R720xd/0X3D66, BIOS 2.2.2 01/16/2014 [177586.215319] 00007f12dff8a000 00000000cdae60bd ffff88062ff6bc70 ffffffff815e23bb [177586.215324] ffff88062ff6bcb8 ffffffff81167b48 00000000006cb600 00000007f12dff8a [177586.215329] ffff880fea8a8c50 00000000006cb600 00007f12dff8a000 00007f12dffde000 [177586.215333] Call Trace: [177586.215337] [] dump_stack+0x19/0x1b [177586.215340] [] print_bad_pte+0x1a8/0x240 [177586.215343] [] unmap_page_range+0x5b0/0x860 [177586.215348] [] unmap_single_vma+0x81/0xf0 [177586.215353] [] ? lru_add_drain_cpu+0xce/0xe0 [177586.215358] [] zap_page_range+0x105/0x170 [177586.215361] [] SyS_madvise+0x394/0x810 [177586.215366] [] ? SyS_futex+0x80/0x180 This was on a 3.10 kernel with the two patches mentioned earlier in this thread. I'm not suggesting it's related, just thought I'd note it as I've never seen a bad page mapping before. --PNTmBPCT7hxwcZjr Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJUgBKQAAoJEMHZnoZn5OShCDwP/RKQlt+4eWx4/y6VD+4zLu1f ja7syrWx+sz52ITGyWgI44MNPxyIipAP8CBDreR5+5lIeBTUBYfz/mMhfS7byFYd DC/IneYsaV8QDdjgvOHgcfaJ+bEUWzcXhPZsdMq6uX94e1Rl1pPS9rEAIjvFv+5i Ks4wjSanVRGSG5fm5yoTGphWvk9dC/rdKC1Zxi6DX4+68tq8CpKwspw0hGzD8rEg FvT130rDhrOTm4SjmR2WPZVUuicxlylHWdnaznxvB7DAiZy9CEAoNayTfHy6WGW0 5HmdHcb9DAolXCxZ2uQgBatwQJWKri+9Be7XUw36SFo6+xfL+b8SjG2wybVEV0/m DKp6R6w3gLMwSRbF9EZMG8d8/ttrdYkADLqGrAWNus11Cn/gnX/4cIgSY6fnV9lw /chsc9og0OAlVNeLpeU3EAT6THzgqBKI9ZAU6FYn/a5l5mR/++iIGSjCf1joL8Re eXQ9Fj9zigEKtFvIgUFhrUDNiwRUPn/After5rigdIdB6mBygOO+os50RHRbnU7J hrPKMZ5y+0xKenoWuvb/rP1qDPG/okBqRD/aMvQHeGxyUt3ci2yH5pYzgL5Odl24 MNfem2Ez4FxVp68d4qjD5Q3i72C58eDRNAL6zFx/dS1aHSIHdjq7uVjwe/+0KUnS +8yGVkB55s/fBJjjOPnL =ppI1 -----END PGP SIGNATURE----- --PNTmBPCT7hxwcZjr-- -- 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