From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Mehmet Giritli" Subject: Re: [Bug 30882] Automatic process group scheduling causes crashes after a while Date: Wed, 16 Mar 2011 19:47:14 +0200 Message-ID: <1300297634.6144.6.camel@mordor> References: <201103152102.p2FL2NN8006070@demeter2.kernel.org> <20110315142435.38d55cb1.akpm@linux-foundation.org> <1300233292.6977.2.camel@mordor> <1300242721.2750.7.camel@perseus> <1300285653.5817.2.camel@mordor> <1300288900.2750.143.camel@perseus> <1300289378.8683.1.camel@mordor> <1300290279.2750.153.camel@perseus> Reply-To: mgiritli@giritli.eu Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Cc: Andrew Morton , linux-fsdevel@vger.kernel.org, Nick Piggin , Al Viro , bugzilla-daemon@bugzilla.kernel.org To: Ian Kent Return-path: Received: from mail.magicbox.biz ([212.108.130.11]:4506 "EHLO ebim.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752664Ab1CPRsa convert rfc822-to-8bit (ORCPT ); Wed, 16 Mar 2011 13:48:30 -0400 In-Reply-To: <1300290279.2750.153.camel@perseus> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Ian, Well, here is a copy-paste of the crash that I am seeing *everytime at shutdown* now that I am running with your patch. It is pretty much identical to the older ones..except that I see this at every time, instead of just rare crashes... Now I am going to revert your patch and check for changes in the frequency of the crashes... Mar 16 18:49:27 mordor kernel: [ 5696.670114] BUG: Dentry ffff88015007f300{i=2,n=donkey} still in use (1) [unmount of nfs 0:f] Mar 16 18:49:27 mordor kernel: [ 5696.670134] ------------[ cut here ]------------ Mar 16 18:49:27 mordor kernel: [ 5696.670187] kernel BUG at fs/dcache.c:943! Mar 16 18:49:27 mordor kernel: [ 5696.670237] invalid opcode: 0000 [#1] SMP Mar 16 18:49:27 mordor kernel: [ 5696.670369] last sysfs file: /sys/devices/platform/it87.552/pwm1_enable Mar 16 18:49:27 mordor kernel: [ 5696.670421] CPU 2 Mar 16 18:49:27 mordor kernel: [ 5696.670466] Modules linked in: ipt_LOG xt_tcpudp xt_state xt_mac iptable_filter iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 iptable_mangle xt_multiport xt_mark xt_conntrack xt_connmark nf_conntr$ Mar 16 18:49:27 mordor kernel: [ 5696.671003] Mar 16 18:49:27 mordor kernel: [ 5696.671003] Pid: 21015, comm: umount.nfs Tainted: P 2.6.38-gentoo #3 Gigabyte Technology Co., Ltd. GA-790FXTA-UD5/GA-790FXTA-UD5 Mar 16 18:49:27 mordor kernel: [ 5696.671003] RIP: 0010:[] [] shrink_dcache_for_umount_subtree+0x268/0x270 Mar 16 18:49:27 mordor kernel: [ 5696.671003] RSP: 0018:ffff880219903e08 EFLAGS: 00010296 Mar 16 18:49:27 mordor kernel: [ 5696.671003] RAX: 0000000000000066 RBX: ffff88015007f300 RCX: 000000000003ffff Mar 16 18:49:27 mordor kernel: [ 5696.671003] RDX: ffffffff81623888 RSI: 0000000000000046 RDI: ffffffff817509f8 Mar 16 18:49:27 mordor kernel: [ 5696.671003] RBP: ffff88023a1480c0 R08: 000000000001fa7c R09: 0000000000000006 Mar 16 18:49:27 mordor kernel: [ 5696.671003] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88015007f3a0 Mar 16 18:49:27 mordor kernel: [ 5696.671003] R13: ffff88023a14811c R14: ffff880219903f18 R15: ffff8802107d9640 Mar 16 18:49:27 mordor kernel: [ 5696.671003] FS: 00007ff9ec925700(0000) GS:ffff8800bfa80000(0000) knlGS:0000000000000000 Mar 16 18:49:27 mordor kernel: [ 5696.671003] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Mar 16 18:49:27 mordor kernel: [ 5696.671003] CR2: 00007fd326cc2bc8 CR3: 0000000232272000 CR4: 00000000000006e0 Mar 16 18:49:27 mordor kernel: [ 5696.671003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Mar 16 18:49:27 mordor kernel: [ 5696.671003] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Mar 16 18:49:27 mordor kernel: [ 5696.671003] Process umount.nfs (pid: 21015, threadinfo ffff880219902000, task ffff88023ca16780) Mar 16 18:49:27 mordor kernel: [ 5696.671003] Stack: Mar 16 18:49:27 mordor kernel: [ 5696.671003] ffff880219af1650 0000000000000000 ffff88023fc07128 ffff880219af1400 Mar 16 18:49:27 mordor kernel: [ 5696.671003] ffff88023a1486c0 ffff880219903f28 ffff88023a03a180 ffffffff810e9624 Mar 16 18:49:27 mordor kernel: [ 5696.671003] ffff88023f4f2480 ffff880219af1400 ffffffff81471460 ffffffff810d5ce5 Mar 16 18:49:27 mordor kernel: [ 5696.671003] Call Trace: Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? shrink_dcache_for_umount+0x54/0x60 Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? generic_shutdown_super+0x25/0x100 Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? kill_anon_super+0x9/0x40 Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? nfs_kill_super+0xd/0x20 Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? deactivate_locked_super+0x43/0x70 Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? release_mounts+0x70/0x90 Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? sys_umount+0x314/0x3d0 Mar 16 18:49:27 mordor kernel: [ 5696.671003] [] ? system_call_fastpath+0x16/0x1b Mar 16 18:49:27 mordor kernel: [ 5696.671003] Code: 8b 0a 31 d2 48 85 f6 74 07 48 8b 96 a8 00 00 00 48 05 50 02 00 00 48 89 de 48 c7 c7 e0 7f 52 81 48 89 04 24 31 c0 e8 f1 f0 35 00 <0f> 0b eb fe 0f 0b eb fe 55 53 48 89 fb 48 8d 7f 68 48$ Mar 16 18:49:27 mordor kernel: [ 5696.678048] RIP [] shrink_dcache_for_umount_subtree+0x268/0x270 Mar 16 18:49:27 mordor kernel: [ 5696.678048] RSP Mar 16 18:49:27 mordor kernel: [ 5696.678552] ---[ end trace 24269d237584cd43 ]--- Mar 16 18:49:28 mordor mountd[4362]: Caught signal 15, un-registering and exiting. Mar 16 18:49:28 mordor kernel: [ 5697.256066] nfsd: last server has exited, flushing export cache Mar 16 18:49:28 mordor kernel: [ 5697.272903] nfsd: last server has exited, flushing export cache