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Date:      Wed, 20 Jan 2021 09:39:55 -0500
From:      Mark Johnston <markj@freebsd.org>
To:        Santiago Martinez <sm@codenetworks.net>
Cc:        FreeBSD Current <current@freebsd.org>
Subject:   Re: VM UMA counters.
Message-ID:  <YAhAu6d5VN2qKfTN@raichu>
In-Reply-To: <49ec694a-7215-c28b-8372-56343df8e30c@codenetworks.net>
References:  <0996195a-6d7f-b058-e95c-b2446688940f@codenetworks.net> <YAg7fYcLdoLfFqaI@raichu> <af6826c6-d1d6-4f9c-19dd-8aa8eb070f66@codenetworks.net> <YAg%2BjqhNaIIo2vSS@raichu> <49ec694a-7215-c28b-8372-56343df8e30c@codenetworks.net>

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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.
> > _______________________________________________
> > freebsd-current@freebsd.org mailing list
> > https://lists.freebsd.org/mailman/listinfo/freebsd-current
> > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
> 






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