Re: deadlocks caused by ext3/reiser dirty_inode calls duringdo_mmap_pgoff

[Andrew Morton]

Chris Mason <mason@xxxxxxxx> wrote:
>
> Hmmm, reiserfs_file_write does fault_in_pages_readable after the
>  transaction is started.

That nests down_read(mmap_sem) inside transaction start, vastly increasing
the deadlock probability.

>  I can at least make the window smaller for now
>  by moving that before the transaction is started.

Much smaller.

We need to decide what the ranking is and stick with it.  I think that's
"transaction start nests inside mmap_sem", agree?
	
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