Excerpts from Tao Ma's message of 2011-02-04 03:36:59 -0500: > 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. Sounds like we just need a synchronize_rcu call before we delete the cache? -chris -- 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
