swapping is completely broken in -CURRENT r334649?

[Mark Johnston]

On Wed, Jun 27, 2018 at 10:46:38AM +0000, Alexey Dokuchaev wrote:
> On Fri, Jun 15, 2018 at 04:40:22AM -0400, Mark Johnston wrote:
> > ...
> > The change was committed as r334752.  Are you seeing unexpected OOM
> > kills on or after that revision?
> 
> I've just discovered this thread.  I've updated my -CURRENT desktop ca.
> June 4th and my X.org session crashes within several minutes.  This is
> on i386 system with 4G RAM.
> 
> I cannot get SVN revision of that kernel because something got broken
> and it was not embedded in the image. :-(
> 
> Rebooting with kernel="kernel.old" from May 12th made this problem go
> away.  Is the root cause is known at this time?  Which revision shall
> I try to see whether it does not exhibit this bug any longer?  Thanks,

As noted earlier in the thread, r329882 introduced a problem where
out-of-memory kills were taking place despite an abundance of free pages
and swap space.  That bug was fixed in r334752.  If you are seeing a
problem that is fixed in a kernel from May 12th, then it is possibly
unrelated to this bug, but it is worth testing r334752 or later to
confirm.