On Sat 07-10-17 00:37:55, Yang Shi wrote:
>
>
> On 10/6/17 2:37 AM, Michal Hocko wrote:
> > On Thu 05-10-17 05:29:10, Yang Shi wrote:
[...]
> > > + list_for_each_entry_safe(s, s2, &slab_caches, list) {
> > > + if (!is_root_cache(s) || (s->flags & SLAB_RECLAIM_ACCOUNT))
> > > + continue;
> > > +
> > > + memset(&sinfo, 0, sizeof(sinfo));
> >
> > why do you zero out the structure. All the fields you are printing are
> > filled out in get_slabinfo.
>
> No special reason, just wipe out the potential stale data on the stack.
Do not add code that has no meaning. The OOM killer is a slow path but
that doesn't mean we should throw spare cycles out of the window.
--
Michal Hocko
SUSE Labs
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