Re: [netfilter-core] kernel panic: Out of memory and no killable processes... (2)

Kirill A. Shutemov
2018-01-30T08:28:24Z

On Tue, Jan 30, 2018 at 09:11:27AM +0100, Florian Westphal wrote:
> Michal Hocko <mhocko@kernel.org> wrote:
> > On Mon 29-01-18 23:35:22, Florian Westphal wrote:
> > > Kirill A. Shutemov <kirill@shutemov.name> wrote:
> > [...]
> > > > I hate what I'm saying, but I guess we need some tunable here.
> > > > Not sure what exactly.
> > >
> > > Would memcg help?
> >
> > That really depends. I would have to check whether vmalloc path obeys
> > __GFP_ACCOUNT (I suspect it does except for page tables allocations but
> > that shouldn't be a big deal). But then the other potential problem is
> > the life time of the xt_table_info (or other potentially large) data
> > structures. Are they bound to any process life time.
>
> No.

Well, IIUC they bound to net namespace life time, so killing all
proccesses in the namespace would help to get memory back. :)

--
Kirill A. Shutemov