[PATCH] aio: ensure access to ctx->ring_pages is correctly serialised

[Benjamin LaHaise]

Hi all,

Based on the issues reported by Tang and Gu, I've come up with the an 
alternative fix that avoids adding additional locking in the event read 
code path.  The fix is to take the ring_lock mutex during page migration, 
which is already used to syncronize event readers and thus does not add 
any new locking requirements in aio_read_events_ring().  I've dropped 
the patches from Tang and Gu as a result.  This patch is now in my 
git://git.kvack.org/~bcrl/aio-next.git tree and will be sent to Linus 
once a few other people chime in with their reviews of this change.  
Please review Tang, Gu.  Thanks!

		-ben
-- 
"Thought is the essence of where you are now."