Re: port-amd64/54988: possible memory leaks/swap problems

[Andrew Doran <ad%netbsd.org@localhost>]

The following reply was made to PR port-amd64/54988; it has been noted by GNATS.

From: Andrew Doran <ad%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, mlh%goathill.org@localhost
Subject: Re: port-amd64/54988: possible memory leaks/swap problems
Date: Tue, 7 Apr 2020 22:12:21 +0000

 On Sun, Apr 05, 2020 at 11:20:01PM +0000, MLH wrote:
 
 >  Another thing I noticed is that it seems to lose memory the fastest
 >  when text is scrolling in an xterm at high speed, such as building
 >  sets, or building/installing pkgsrc binaries. If I hide the window
 >  during those operations, the loss rate slows pretty dramatically.
 
 I tried compiling some stuff with the output going to an xterm and sure
 enough it starts to leak out of kmem-192:
 
 $ vmstat -m | grep kmem-00192
 kmem-00192   192  2911902   28        0 138662    0 138662 138662   0   inf    0
 $ vmstat -C | grep kmem-00192 
 kmem-00192     182    15    0   39   2939175    3245745   9.4    35909883  91.0
 
 It wasn't leaking before that, so it's a good repro.  Looking with dtrace
 there are many allocations happenning in the DRM code which is probably the
 first place I'd look given that it's very X specific.  Will need to think
 about it some more.
 
 Andrew