Re: [patch 3/4 -mm] flex_array: poison free elements

[David Rientjes]

On Wed, 9 Sep 2009, Dave Hansen wrote:

> It shouldn't be too hard to do that, though.  Although a bit silly to
> have make a copy_to_user() call for each ->parts[] page, it would be
> pretty easy to implement.  
> 

Right, but the event buffer becomes slower as a whole because of the 
multiple copy_to_user() on read, indirection into each flex_array_part, 
and add_event_entry() would now require a memcpy.
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