VM UMA counters.

[Mark Johnston]

On Wed, Jan 20, 2021 at 02:34:28PM +0000, Santiago Martinez wrote:
> yes that correct, just booted with the patch applied for the bufdaemon .
> 
> Will keep an eye on it, and let you know how it goes.
> 
> Any specific values that i should look on vmstat?

The ones I'm interested in are:

0 page daemon wakeups
160056 pages examined by the page daemon
0 clean page reclamation shortfalls
0 pages reactivated by the page daemon
0 pages freed by daemon

In particular I wanted to see if any clean page reclamation shortfalls
had occurred, since that indicates a severe free memory shortage which
could be responsible for UMA allocation failures.

> 
> On 1/20/21 2:30 PM, Mark Johnston wrote:
> > On Wed, Jan 20, 2021 at 02:24:59PM +0000, Santiago Martinez wrote:
> >> Hi Mark,
> >>
> >> To the DRM question, indeed I am using drm-devel with amdgpu.
> > Have you updated to commit 4af932354260 or later?  That helps address a
> > memory reclamation bug triggered by amdgpu.
> >
> >> Here is the vmstat -s output.
> > I guess this is from a fresh boot?  It would be most useful to see 
> > vmstat -s output taken at a time when the number of bucket allocation
> > failures is also increasing.  But, please try updating first to see if
> > the lockups persist.
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