lock issues

[Herbert Poetzl]

Hi Trond!

experiencing the following panic on a linux-vserver
kernel (2.6.9-rc4, no modifications to locking)

Kernel panic - not syncing: Attempting to free lock with active block list

it's not easy to trigger but it happens now and then.
after adding a dump_stack() in panic() this is the trace

[<8011b945>] panic+0x55/0xe0		       
[<80174897>] fcntl_setlk64+0x137/0x2d0         
[<80119540>] autoremove_wake_function+0x0/0x60 
[<80179aba>] dnotify_parent+0x3a/0xb0	       
[<8015dc49>] fget+0x49/0x60		       
[<8016fa5b>] sys_fcntl64+0x4b/0xa0	       
[<8010426f>] syscall_call+0x7/0xb

it's the locks_free_lock(file_lock); at the end of 
fcntl_setlk64() and I'm asking myself if something
like in sys_flock()

        if (list_empty(&lock->fl_link)) {
                locks_free_lock(lock);
        }

would help here or just paper over the real issue?

TIA,
Herbert

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/