Re: [PATCH V4] mlx4_core: allocate ICM memory in page size chunks

From: Michal Hocko
Date: Thu May 31 2018 - 05:10:30 EST


On Thu 31-05-18 10:55:32, Michal Hocko wrote:
> On Thu 31-05-18 04:35:31, Eric Dumazet wrote:
[...]
> > I merely copied/pasted from alloc_skb_with_frags() :/
>
> I will have a look at it. Thanks!

OK, so this is an example of an incremental development ;).

__GFP_NORETRY was added by ed98df3361f0 ("net: use __GFP_NORETRY for
high order allocations") to prevent from OOM killer. Yet this was
not enough because fb05e7a89f50 ("net: don't wait for order-3 page
allocation") didn't want an excessive reclaim for non-costly orders
so it made it completely NOWAIT while it preserved __GFP_NORETRY in
place which is now redundant. Should I send a patch?

--
Michal Hocko
SUSE Labs