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Re: kern/54818: 9.0_RC1 pagedaemon spins
The following reply was made to PR kern/54818; it has been noted by GNATS.
From: Havard Eidnes <he%uninett.no@localhost>
To: gnats-bugs%netbsd.org@localhost, mlelstv%serpens.de@localhost
Cc: ad%netbsd.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: kern/54818: 9.0_RC1 pagedaemon spins
Date: Mon, 02 Mar 2020 15:34:00 +0100 (CET)
> > > http://www.netbsd.org/~ad/2020/uvm-9.diff
> > I've manually applied this diff to my 8.1_RC1 src tree, and the
> > build succeeded. Any predictions whether this has any chance of
> > improving the situation?
> I'd say no. If there is (enough) free memory the pagedaemon should
> only be running if there is a kernel VA shortage and the diff doesn'=
> influence that.
Hm, I guess hat jives with Izumi's observations that the loop
However... This leaves two questions which IMO needs validation:
1) Is there "enough" free memory?
2) Is there a kernel VA shortage?
Is there any information I can collect to answer one or both of
these? Is just "vmstat -s" enough (only answers #1?), or is more
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