From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clark Williams Subject: backtrace from tmpfs umount on 2.6.33.4-rt19 (tip/rt/2.6.33) Date: Fri, 14 May 2010 14:45:06 -0500 Message-ID: <20100514144506.1046599c@torg> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/ujbwIKIArDPbVxgk0FMNaKx"; protocol="application/pgp-signature" To: Thomas Gleixner , Peter Zijlstra , RT Return-path: Received: from mx1.redhat.com ([209.132.183.28]:1731 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751171Ab0ENTp0 (ORCPT ); Fri, 14 May 2010 15:45:26 -0400 Sender: linux-rt-users-owner@vger.kernel.org List-ID: --Sig_/ujbwIKIArDPbVxgk0FMNaKx Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Thomas/Peter, I got the below backtrace while running the 'mock' unit-tests (most of which make heavy use of tmpfs). Basically it's creating a chroot build environment for a particular distro (in this case fedora-12-x86_64) and building a source RPM inside that chroot.=20 I'm running 2.6.33.4-rt19 from tip/rt/2.6.33 Clark BUG: Dentry ffff880053401928{i=3D1ef806,n=3Dptmx} still in use (-1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ kernel BUG at fs/dcache.c:835! invalid opcode: 0000 [#1] PREEMPT SMP=20 last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:00/PNP0C09:00/= PNP0C0A:00/power_supply/BAT0/status CPU 0 Pid: 14563, comm: umount Not tainted 2.6.33.4-rt19 #36 / RIP: 0010:[] [] shrink_dcache_for_umount_subtree+0x119/0x253 RSP: 0018:ffff880080073da8 EFLAGS: 00010292 RAX: 000000000000005f RBX: ffff880053401928 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000046 RDI: ffff880080073c88 RBP: ffff880080073de8 R08: ffff88009823c000 R09: 0000000000000073 R10: 0000000000000000 R11: 0000000000000000 R12: ffff880011f7ad18 R13: ffff8800534019c8 R14: ffff880011f7ad10 R15: ffff8800b4bb6e08 FS: 00007f62035d4740(0000) GS:ffff88000a200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007f6202c9b488 CR3: 0000000076b36000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process umount (pid: 14563, threadinfo ffff880080072000, task ffff88003d6da5c0) Stack: ffff88004329b2f0 0000000000000000 ffff88003d6da5c0 ffff880037ddeb18 <0> ffff88004329b000 ffff880037ddeb20 ffffffff81af26d0 ffff880080073fd8 <0> ffff880080073e18 ffffffff81108092 ffff880037ddeb20 ffff88004329b000 Call Trace: [] shrink_dcache_for_umount+0x46/0x5b [] generic_shutdown_super+0x1f/0xf9 [] kill_anon_super+0x16/0x54 [] kill_litter_super+0x27/0x2b [] deactivate_super+0x6d/0x82 [] mntput_no_expire+0x1a5/0x218 [] sys_umount+0x2d5/0x300 [] ? audit_syscall_entry+0x1ec/0x218 [] system_call_fastpath+0x16/0x1b Code: 0a 48 8b 4b 70 31 d2 48 85 f6 74 04 48 8b 56 40 48 05 f0 02 00 00 48 89 de 48 89 04 24 48 c7 c7 6f 9a 78 81 31 c0 e8 93 be 32 00 <0f> 0b eb fe 4c 8b 63 60 4c 39 e3 75 3c 48 8b 93 90 00 00 00 48 RIP [] shrink_dcache_for_umount_subtree+0x119/0x253 RSP ---[ end trace 34e97e0ec2c5ae6a ]--- --Sig_/ujbwIKIArDPbVxgk0FMNaKx Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (GNU/Linux) iEYEARECAAYFAkvtqEsACgkQHyuj/+TTEp3hMwCfQ7lDQAfBvJNNyseTLXZoPuMI WDYAmQHHTqCwxb8tJMT41YB6rXbsw9Xe =CzX2 -----END PGP SIGNATURE----- --Sig_/ujbwIKIArDPbVxgk0FMNaKx--