On Fri, 8 Jun 2012 13:23:56 -0700
Pravin Shelar [off-list ref] wrote:

On Fri, Jun 8, 2012 at 1:15 PM, Christoph Lameter [off-list ref] wrote:

quoted

On Fri, 8 Jun 2012, Andrew Morton wrote:

quoted

OK. __I assume this bug has been there for quite some time.

Well the huge pages refcount tricks caused the issue.

quoted

How serious is it? __Have people been reporting it in real workloads?
How to trigger it? __IOW, does this need -stable backporting?

Possibly.

If this patch is getting back-ported then we shld also do same for
5bf5f03c271907978 (mm: fix slab->page flags corruption) which fixes
other issue related to slub  and huge page sharing.

Well I don't know if either are getting backported yet.

To decide that we would have to understand the end-user impact of the
bug(s).  Please tell us?

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