Rik van Riel wrote:
>
> Hi,
>
> Almost the same patch as before, except this one has had
> a few hours of testing by Andrew Morton and two bugs have
> been ironed out, most notably the truncate_complete_page()
> race. This patch is probably safe since Andrew got bored
> when no new bugs showed up ...
>
The box died, but not due to rmap. We have a lock ranking
bug:
do_exit
->mmput
->exit_mmap page_table_lock
->removed_shared_vm_struct
->lock_vma_mappings i_shared_lock
versus
do_truncate
->notify_change
->inode_setattr
->vmtruncate i_shared_lock
->vmtruncate_list
->zap_page_range page_table_lock
It seems that in 2.5.16, a call to remove_shared_vm_struct() was
added to exit_mmap(), inside mm->page_table_lock.
That ranking conflicts with truncate.
-
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This archive was generated by hypermail 2b29 : Sun Jul 07 2002 - 22:00:16 EST