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SubjectRe: [PATCH] memcg: do not expose uninitialized mem_cgroup_per_node to world
On Fri, 10 Jun 2011 18:57:40 +0200
Igor Mammedov <imammedo@redhat.com> wrote:

> On 06/08/2011 11:09 PM, Andrew Morton wrote:
> > The original patch:
> >
> > --- a/mm/memcontrol.c
> > +++ b/mm/memcontrol.c
> > @@ -4707,7 +4707,6 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
> > if (!pn)
> > return 1;
> >
> > - mem->info.nodeinfo[node] = pn;
> > for (zone = 0; zone< MAX_NR_ZONES; zone++) {
> > mz =&pn->zoneinfo[zone];
> > for_each_lru(l)
> > @@ -4716,6 +4715,7 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
> > mz->on_tree = false;
> > mz->mem = mem;
> > }
> > + mem->info.nodeinfo[node] = pn;
> > return 0;
> > }
> >
> > looks like a really good idea. But it needs a new changelog and I'd be
> > a bit reluctant to merge it as it appears that the aptch removes our
> > only known way of reproducing a bug.
> >
> > So for now I think I'll queue the patch up unchangelogged so the issue
> > doesn't get forgotten about.
> >
> Problem was in rhel's xen hv.
> It was missing fix for imul emulation.
> Details here
> http://lists.xensource.com/archives/html/xen-devel/2011-06/msg00801.html
> Thanks to Tim Deegan and everyone who was involved in the discussion.

I really don't want to trawl through a lengthy xen bug report and write
your changelog for you.

We still have no changelog for this patch. Please send one.


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