On 05/11/2010 01:11 PM, Linus Torvalds wrote:
On Tue, 11 May 2010, Mel Gorman wrote:
This patch closes the most important race in relation to exec and
migration. With it applied, the swapops bug is no longer triggering for
known problem workloads. If you pick it up, it should go with the other
mmmigration-* fixes in mm.
Ack. _Much_ better and clearer.
I'm not entirely sure we need that "maybe_stack" (if we need it, that
would sound like a problem anyway), but I guess it can't hurt either.
Just a heads up - I am looking at creating a patch now that
allows us to _always_ lock the root anon_vma lock, when locking
the anon_vma.
That should take care of the other issue pretty cleanly, while
still allowing us to only walk the VMAs we have to walk in
places like rmap_walk.
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