On Tue 26-07-11 14:17:54, Andrew Morton wrote:
> On Fri, 10 Jun 2011 18:57:40 +0200
> Igor Mammedov <imammedo@xxxxxxxxxx> 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
The bug turned out to be Xen specific and this patch just hidden the bug
in Xen.
> and write your changelog for you.
>
> We still have no changelog for this patch. Please send one.
Appart from a better programming style is there any other reason for
taking it? If applied it might hide potential bugs when somebody is
touching data too early.
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>