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DateMon, 23 Jan 2006 11:14:51 +0300
FromKirill Korotaev <>
SubjectRe: [PATCH] Busy inodes after unmount, be more verbose in generic_shutdown_super
>>CPU 1				CPU 2
>>~~~~~				~~~~~
>>umount /dev/sda1
>>generic_shutdown_super          shrink_dcache_memory()
>>shrink_dcache_parent            dput dentry
>>select_parent                   prune_one_dentry()
>>                                <<<< child is dead, locks are released,
>>                                  but parent is still referenced!!! >>>>
>>skip dentry->parent,
>>since it's d_count > 0
>>
>>message: BUSY inodes after umount...
>>                                <<< parent is left on dentry_unused list,
>>                                   referencing freed super block >>>
> 
> 
> I see. The problem is that dcache_lock is given up before dereferencing the
> parent. But your patch seems to be wrong anyway IMHO. I'll post patches in a
> seperate thread.
Jan, I still have not heard a single comment about what's wrong with 
it... I would really appreciate if you provide me one.

Kirill

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