On 02/04/2011 02:51 AM, Boaz Harrosh wrote:
Last good Kernel was 2.6.37 I'm doing a "mount" then "unmount". I think root is the only created inode. rmmod is called immediately after "unmount" within a script if I only do unmount and manually call "modprobe --remove exofs" after a small while all is fine. I get: slab error in kmem_cache_destroy(): cache `exofs_inode_cache': Can't free all objects Call Trace: 77dfde08: [<6007e9a6>] kmem_cache_destroy+0x82/0xca 77dfde38: [<7c1fa3da>] exit_exofs+0x1a/0x1c [exofs] 77dfde48: [<60054c10>] sys_delete_module+0x1b9/0x217 77dfdee8: [<60014d60>] handle_syscall+0x58/0x70 77dfdf08: [<60024163>] userspace+0x2dd/0x38a 77dfdfc8: [<600126af>] fork_handler+0x62/0x69
I also get a similar error when testing ext4 and a bug is opened there. https://bugzilla.kernel.org/show_bug.cgi?id=27652 And I have done some simple investigation for ext4 and It looks as if now with the new *fs_i_callback doesn't free the inode to *fs_inode_cache immediately. So the old logic will destroy the inode cache before we free all the inode object. Since there are more than one fs affected by this, we may need to find a way in the VFS. Regards, Tao
The UML Kernel also crashes after this message, with: Modules linked in: nfsd exportfs nfs lockd nfs_acl auth_rpcgss sunrpc cryptomgr aead crc32c crypto_hash crypto_algapi iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi scsi_mod binfmt_misc [last unloaded: libosd] Pid: 6, comm: rcu_kthread Not tainted 2.6.38-rc3+ RIP: 0033:[<000000007c1fa0e7>] RSP: 000000007943be18 EFLAGS: 00010246 RAX: 000000007943a000 RBX: 000000007937bb80 RCX: 0000000000000095 RDX: 000000007937c8b8 RSI: 0000000077fb6c80 RDI: 000000007937bb80 RBP: 000000007943be40 R08: 000000007943be10 R09: 000000007943a000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000795123e0 R13: 0000000000000001 R14: 0000000000000000 R15: 000000000000000a Call Trace: 602678f8: [<600144ed>] segv+0x70/0x212 60267928: [<6001cd9e>] ubd_intr+0x72/0xdf 60267988: [<601b778e>] _raw_spin_unlock_irqrestore+0x18/0x1c 602679d8: [<600146ee>] segv_handler+0x5f/0x65 60267a08: [<60021488>] sig_handler_common+0x84/0x98 60267ab0: [<60130926>] strncpy+0xf/0x27 60267b38: [<600215ce>] sig_handler+0x30/0x3b 60267b58: [<60021800>] handle_signal+0x6d/0xa3 60267ba8: [<60023180>] hard_handler+0x10/0x14 Kernel panic - not syncing: Segfault with no mm Call Trace: 602677f8: [<601b52b1>] panic+0xea/0x1e6 60267818: [<6007e299>] kmem_cache_free+0x54/0x5f 60267850: [<6005342e>] __module_text_address+0xd/0x53 60267868: [<6005347d>] is_module_text_address+0x9/0x11 60267878: [<6004290c>] __kernel_text_address+0x65/0x6b 60267880: [<60023180>] hard_handler+0x10/0x14 60267898: [<6001345e>] show_trace+0x8e/0x95 602678c8: [<60026c40>] show_regs+0x2b/0x2f 602678f8: [<60014577>] segv+0xfa/0x212 60267928: [<6001cd9e>] ubd_intr+0x72/0xdf 60267988: [<601b778e>] _raw_spin_unlock_irqrestore+0x18/0x1c 602679d8: [<600146ee>] segv_handler+0x5f/0x65 60267a08: [<60021488>] sig_handler_common+0x84/0x98 60267ab0: [<60130926>] strncpy+0xf/0x27 60267b38: [<600215ce>] sig_handler+0x30/0x3b 60267b58: [<60021800>] handle_signal+0x6d/0xa3 60267ba8: [<60023180>] hard_handler+0x10/0x14 Modules linked in: nfsd exportfs nfs lockd nfs_acl auth_rpcgss sunrpc cryptomgr aead crc32c crypto_hash crypto_algapi iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi scsi_mod binfmt_misc [last unloaded: libosd] Pid: 6, comm: rcu_kthread Not tainted 2.6.38-rc3+ RIP: 0033:[<0000003ea3832ad7>] RSP: 00007fff63338e38 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000219 RCX: ffffffffffffffff RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000000219 RBP: 00007fff63338e70 R08: 0000000000000000 R09: 00007fff63338e70 R10: 00007fff63338be0 R11: 0000000000000202 R12: 0000000000000215 R13: 00007fe54ee756a8 R14: 00007fff63339090 R15: 00007fff63339928 Call Trace: 60267788: [<6001485b>] panic_exit+0x2f/0x45 602677a8: [<60048ad6>] notifier_call_chain+0x32/0x5e 602677e8: [<60048b24>] atomic_notifier_call_chain+0x13/0x15 602677f8: [<601b52cc>] panic+0x105/0x1e6 60267818: [<6007e299>] kmem_cache_free+0x54/0x5f 60267850: [<6005342e>] __module_text_address+0xd/0x53 60267868: [<6005347d>] is_module_text_address+0x9/0x11 60267878: [<6004290c>] __kernel_text_address+0x65/0x6b 60267880: [<60023180>] hard_handler+0x10/0x14 60267898: [<6001345e>] show_trace+0x8e/0x95 602678c8: [<60026c40>] show_regs+0x2b/0x2f 602678f8: [<60014577>] segv+0xfa/0x212 60267928: [<6001cd9e>] ubd_intr+0x72/0xdf 60267988: [<601b778e>] _raw_spin_unlock_irqrestore+0x18/0x1c 602679d8: [<600146ee>] segv_handler+0x5f/0x65 60267a08: [<60021488>] sig_handler_common+0x84/0x98 60267ab0: [<60130926>] strncpy+0xf/0x27 60267b38: [<600215ce>] sig_handler+0x30/0x3b 60267b58: [<60021800>] handle_signal+0x6d/0xa3 60267ba8: [<60023180>] hard_handler+0x10/0x14 Thanks Boaz -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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