Bart: We haven't seen this problem. Will have to see if we can reproduce it and let you know.
Thanks for letting us know. Becky On Tuesday, October 30, 2012, Bart Taylor wrote: > > Has anyone else experienced consistent kernel panics on unmount? > > I frequently get a kernel panic when I unmount a file system from a RHEL5 > x86_64 client (kernel = 2.6.18-308.el5). That is the latest RHEL5 kernel. I > tested this against a stock Orangefs 2.8.6 build and also against older > PVFS 2.8 and PVFS 2.6 builds; a panic results in all cases. I also tried an > errata build kernel=2.6.18-308.8.1.el5. > > Here is my test case: > > Setup: > [root@client1 ~]# mkdir /mnt/orangefs/foo > [root@client1 ~]# echo "bar" > /mnt/orangefs/foo/bar > > Trigger a panic: > [root@client1 ~]# mount -t pvfs2 tcp://server2:3334/pvfs2-fs > /mnt/orangefs/ > [root@client1 ~]# cp /mnt/orangefs/foo/bar /mnt/orangefs/ > [root@client1 ~]# umount /mnt/orangefs/ > > > Below is the backtrace I get from the core file. The exception is always > in shrink_dcache_for_unmount via the pvfs2_kill_sb call. > > Bart. > > > > crash> bt > PID: 30232 TASK: ffff8101bbf220c0 CPU: 0 COMMAND: "umount" > #0 [ffff81019eb77b60] crash_kexec at ffffffff800b099c > #1 [ffff81019eb77c20] __die at ffffffff80065137 > #2 [ffff81019eb77c60] die at ffffffff8006c789 > #3 [ffff81019eb77c90] do_invalid_op at ffffffff8006cd49 > #4 [ffff81019eb77d50] error_exit at ffffffff8005dde9 > [exception RIP: shrink_dcache_for_umount_subtree+375] > RIP: ffffffff800ef567 RSP: ffff81019eb77e08 RFLAGS: 00010286 > RAX: 000000000000005d RBX: ffff8101a32029c0 RCX: ffffffff80323028 > RDX: ffffffff80323028 RSI: 0000000000000000 RDI: ffffffff80323020 > RBP: ffff81019eb4e9d0 R8: ffffffff80323028 R9: 000000000000003e > R10: ffff81019eb77aa8 R11: 0000000000000080 R12: ffff8101a3202a20 > R13: 0000000000000000 R14: 0000000000000000 R15: 00000000125aa580 > ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 > #5 [ffff81019eb77e30] shrink_dcache_for_umount at ffffffff800efa83 > #6 [ffff81019eb77e40] generic_shutdown_super at ffffffff800e774d > #7 [ffff81019eb77e60] kill_anon_super at ffffffff800e787b > #8 [ffff81019eb77e70] pvfs2_kill_sb at ffffffff88725b8a [pvfs2] > #9 [ffff81019eb77e90] deactivate_super at ffffffff800e792c > #10 [ffff81019eb77eb0] sys_umount at ffffffff800f1e8b > #11 [ffff81019eb77f80] system_call at ffffffff8005d116 > RIP: 00000036b80d4a67 RSP: 00007fffc15c4ee8 RFLAGS: 00010246 > RAX: 00000000000000a6 RBX: ffffffff8005d116 RCX: 0000000000406d3f > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000125ab490 > RBP: 00000000125ab4f0 R8: 0000000000000004 R9: 0000000000000001 > R10: 0000000000000008 R11: 0000000000000246 R12: 00000000125ab460 > R13: 00000000125ab490 R14: 00000000125ab4f0 R15: 0000000000000000 > ORIG_RAX: 00000000000000a6 CS: 0033 SS: 002b > > -- Becky Ligon OrangeFS Support and Development Omnibond Systems Anderson, South Carolina
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