Re: CONFIG_VMAP_STACK, on-stack struct, and wake_up_bit

[Linus Torvalds]

On Wed, Oct 26, 2016 at 11:04 AM, Bob Peterson <rpeterso@xxxxxxxxxx> wrote:
>
> I can test it for you, if you give me about an hour.

I can definitely wait an hour, it would be lovely to see more testing.
Especially if you have a NUMA machine and an interesting workload.

And if you actually have that NUMA machine and a load that shows the
page_waietutu effects, it would also be lovely if you can then
_additionally_ test the patch that PeterZ wrote a few weeks ago, it
was on the mm list about a month ago:

  Date: Thu, 29 Sep 2016 15:08:27 +0200
  From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
  Subject: Re: page_waitqueue() considered harmful
  Message-ID: <20160929130827.GX5016@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

and if you don't find it I can forward it to you (Peter had a few
versions, that latest one is the one that looked best).

                Linus