I built a kernel based on Steve's tree, enabled the fscache option and got the following panic at umount. I didn't mount with -o fsc or anything. I have some other patches on top of Steve's tree, but I'm fairly certain they wouldn't affect this. For the record, here's the fstab entry (with anonymized names): //server.example.com/scratch /mnt/anonymous cifs sec=none,user,noperm,noauto 0 0 Disabling the fscache stuff at build time makes the problem go away. ------------------------------[snip]------------------------------ general protection fault: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map CPU 0 Modules linked in: cifs fscache nls_utf8 nfsd lockd nfs_acl exportfs rpcsec_gss_krb5 auth_rpcgss des_generic sunrpc ipv6 joydev i2c_piix4 microcode virtio_balloon i2c_core virtio_net virtio_blk virtio_pci virtio_ring virtio [last unloaded: cifs] Pid: 1400, comm: umount Not tainted 2.6.35-0.49.rc5.git2.fc14.x86_64 #1 / RIP: 0010:[<ffffffffa0227dc7>] [<ffffffffa0227dc7>] __fscache_relinquish_cookie+0x4f/0x246 [fscache] RSP: 0018:ffff880036ef5d78 EFLAGS: 00010202 RAX: 00200000000040c3 RBX: 6b6b6b6b6b6b6b6b RCX: 00000000001c0013 RDX: ffff8800370c5ff0 RSI: 0000000000000000 RDI: ffffffffa022eca0 RBP: ffff880036ef5da8 R08: ffffffff81a2e938 R09: 000000000000005a R10: ffffffff828d7eb8 R11: ffff880036ef5ba8 R12: 0000000000000000 R13: ffff8800370c6fe8 R14: 0000000000000000 R15: ffff8800373388c0 FS: 00007fb2909d5760(0000) GS:ffff880004600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007fb2900577e3 CR3: 000000003be47000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process umount (pid: 1400, threadinfo ffff880036ef4000, task ffff88003ca548a0) Stack: ffffffffa02b91f8 ffff8800370c7230 00000000000003b9 ffff8800370c6fe8 <0> 0000000000000000 ffff8800373388c0 ffff880036ef5db8 ffffffffa02a7246 <0> ffff880036ef5dd8 ffffffffa02a73b5 ffff880036ef5dd8 ffff8800370c7230 Call Trace: [<ffffffffa02a7246>] fscache_relinquish_cookie+0x13/0x15 [cifs] [<ffffffffa02a73b5>] cifs_fscache_release_super_cookie+0x44/0x53 [cifs] [<ffffffffa028e035>] cifs_put_tcon+0xf2/0x102 [cifs] [<ffffffffa0290410>] cifs_umount+0x19/0x3e [cifs] [<ffffffffa028477e>] cifs_put_super+0x84/0xee [cifs] [<ffffffff8112af62>] generic_shutdown_super+0x5b/0xe1 [<ffffffff8112b03d>] kill_anon_super+0x16/0x54 [<ffffffff8112b604>] deactivate_locked_super+0x26/0x46 [<ffffffff8112bd57>] deactivate_super+0x3a/0x3e [<ffffffff81140554>] mntput_no_expire+0x81/0xb2 [<ffffffff811410f3>] sys_umount+0x2da/0x30c [<ffffffff81497f7e>] ? lockdep_sys_exit_thunk+0x35/0x67 [<ffffffff81009c72>] system_call_fastpath+0x16/0x1b Code: 54 fb ff ff 45 85 e4 74 0c 48 c7 c7 ac ec 22 a0 e8 43 fb ff ff 48 85 db 75 11 48 c7 c7 a4 ec 22 a0 e8 32 fb ff ff e9 eb 01 00 00 <8b> 43 04 85 c0 74 17 48 8b b3 90 00 00 00 48 c7 c7 5b cd 22 a0 RIP [<ffffffffa0227dc7>] __fscache_relinquish_cookie+0x4f/0x246 [fscache] RSP <ffff880036ef5d78> ---[ end trace f2d78e2c68d1be76 ]--- ------------[ cut here ]------------ WARNING: at kernel/exit.c:896 do_exit+0x46/0x7d0() Hardware name: Modules linked in: cifs fscache nls_utf8 nfsd lockd nfs_acl exportfs rpcsec_gss_krb5 auth_rpcgss des_generic sunrpc ipv6 joydev i2c_piix4 microcode virtio_balloon i2c_core virtio_net virtio_blk virtio_pci virtio_ring virtio [last unloaded: cifs] Pid: 1400, comm: umount Tainted: G D 2.6.35-0.49.rc5.git2.fc14.x86_64 #1 Call Trace: [<ffffffff810510ba>] warn_slowpath_common+0x85/0x9d [<ffffffff810510ec>] warn_slowpath_null+0x1a/0x1c [<ffffffff81054a07>] do_exit+0x46/0x7d0 [<ffffffff81498aef>] ? _raw_spin_unlock_irqrestore+0x4d/0x52 [<ffffffff81499d2a>] ? oops_end+0x73/0xc7 [<ffffffff81499d76>] oops_end+0xbf/0xc7 [<ffffffff8100d718>] die+0x5a/0x66 [<ffffffff8149971a>] do_general_protection+0x133/0x13b [<ffffffff81498e40>] ? irq_return+0x0/0x10 [<ffffffff81499085>] general_protection+0x25/0x30 [<ffffffffa0227dc7>] ? __fscache_relinquish_cookie+0x4f/0x246 [fscache] [<ffffffffa0227da0>] ? __fscache_relinquish_cookie+0x28/0x246 [fscache] [<ffffffffa02a7246>] fscache_relinquish_cookie+0x13/0x15 [cifs] [<ffffffffa02a73b5>] cifs_fscache_release_super_cookie+0x44/0x53 [cifs] [<ffffffffa028e035>] cifs_put_tcon+0xf2/0x102 [cifs] [<ffffffffa0290410>] cifs_umount+0x19/0x3e [cifs] [<ffffffffa028477e>] cifs_put_super+0x84/0xee [cifs] [<ffffffff8112af62>] generic_shutdown_super+0x5b/0xe1 [<ffffffff8112b03d>] kill_anon_super+0x16/0x54 [<ffffffff8112b604>] deactivate_locked_super+0x26/0x46 [<ffffffff8112bd57>] deactivate_super+0x3a/0x3e [<ffffffff81140554>] mntput_no_expire+0x81/0xb2 [<ffffffff811410f3>] sys_umount+0x2da/0x30c [<ffffffff81497f7e>] ? lockdep_sys_exit_thunk+0x35/0x67 [<ffffffff81009c72>] system_call_fastpath+0x16/0x1b ---[ end trace f2d78e2c68d1be77 ]--- -- Jeff Layton <jlayton@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
