Return-Path: Received: from netnation.com ([204.174.223.2]:33487 "EHLO peace.netnation.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1760327Ab0LOBKZ (ORCPT ); Tue, 14 Dec 2010 20:10:25 -0500 Date: Tue, 14 Dec 2010 17:10:21 -0800 From: Simon Kirby To: Trond Myklebust Cc: linux-nfs@vger.kernel.org Subject: Re: System CPU increasing on idle 2.6.36 Message-ID: <20101215011021.GA24594@hostway.ca> References: <20101208212505.GA18192@hostway.ca> <1291845189.3067.31.camel@heimdal.trondhjem.org> <20101208223622.GA3796@hostway.ca> <1291869437.2821.6.camel@heimdal.trondhjem.org> <20101214233843.GB836@hostway.ca> Content-Type: text/plain; charset=us-ascii In-Reply-To: <20101214233843.GB836@hostway.ca> Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 On Tue, Dec 14, 2010 at 03:38:43PM -0800, Simon Kirby wrote: > I'm just about to try > 2.6.37-rc5-git3 on there plus your NFS fixes (which Linus seems to have > half-merged and uploaded as -git3 but not pushed to his public git) Ignore this; I was just confusing myself by having the leak fixes already applied. Otoh, I got this Oops while trying NFSv4. I'll check my merging again. Do you have a git branch exposed with the "Allow the admin to turn off NFSv4 uid/gid mapping" patches applied? Simon- [ 89.312786] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018 [ 89.316758] IP: [] nfs_follow_remote_path+0x212/0x3c0 [ 89.316758] PGD 2221c5067 PUD 225324067 PMD 0 [ 89.316758] Oops: 0000 [#1] SMP [ 89.316758] last sysfs file: /sys/devices/platform/dcdbas/smi_data_buf_phys_addr [ 89.316758] CPU 0 [ 89.316758] Modules linked in: ipmi_devintf ipmi_si ipmi_msghandler bnx2 [ 89.316758] [ 89.316758] Pid: 4632, comm: mount.nfs Not tainted 2.6.37-rc5-git3-hw #1 0NH278/PowerEdge 2950 [ 89.316758] RIP: 0010:[] [] nfs_follow_remote_path+0x212/0x3c0 [ 89.316758] RSP: 0018:ffff880222073c98 EFLAGS: 00010246 [ 89.316758] RAX: ffff880222069a40 RBX: ffff8802222e0000 RCX: 0000000000000003 [ 89.316758] RDX: ffff8802222e0000 RSI: 0000000000000002 RDI: 0000000000000000 [ 89.316758] RBP: ffff880222073cd8 R08: ffff8800cfc16548 R09: ffffffff81a0c950 [ 89.316758] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 89.316758] R13: 0000000000000000 R14: ffff880226698d00 R15: ffff8802252df180 [ 89.316758] FS: 00007f6626f176e0(0000) GS:ffff8800cfc00000(0000) knlGS:0000000000000000 [ 89.316758] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 89.316758] CR2: 0000000000000018 CR3: 000000022516d000 CR4: 00000000000006f0 [ 89.316758] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.316758] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 89.316758] Process mount.nfs (pid: 4632, threadinfo ffff880222072000, task ffff8802222e0000) [ 89.316758] Stack: [ 89.316758] ffff880226699800 ffff880222007040 ffff880222337f40 0000000026698d00 [ 89.316758] ffff880222007040 0000000000000000 ffff880226699800 ffff880222040c00 [ 89.316758] ffff880222073d08 ffffffff8120f09e 0000000000000000 ffff8802220eea00 [ 89.316758] Call Trace: [ 89.316758] [] nfs4_try_mount+0x9e/0xe0 [ 89.316758] [] nfs_get_sb+0x500/0xae0 [ 89.316758] [] ? pcpu_alloc+0x7ab/0x950 [ 89.316758] [] ? ida_get_new_above+0x151/0x220 [ 89.316758] [] ? __alloc_percpu+0xb/0x10 [ 89.316758] [] vfs_kern_mount+0x11f/0x1a0 [ 89.316758] [] do_kern_mount+0x4e/0x110 [ 89.316758] [] do_mount+0x241/0x870 [ 89.316758] [] ? copy_mount_options+0xf2/0x190 [ 89.316758] [] sys_mount+0xb3/0xe0 [ 89.316758] [] system_call_fastpath+0x16/0x1b [ 89.316758] Code: 65 48 8b 14 25 40 cc 00 00 eb 0f 66 0f 1f 44 00 00 48 39 57 10 74 14 48 89 c7 48 8b 07 48 81 ff f0 20 9a 81 0f 18 08 75 e8 31 ff <8b> 47 18 83 e8 01 85 c0 89 47 18 0f 84 c5 00 00 00 31 ff fe 05 [ 89.316758] RIP [] nfs_follow_remote_path+0x212/0x3c0 [ 89.316758] RSP [ 89.316758] CR2: 0000000000000018 [ 89.845673] ---[ end trace 2be6416a581974cc ]---