Re: wired memory leak?

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Oct 29, 2026 at 05:56:27PM -0400, Greg Troxel wrote:
> I have a pretty normal system, 9th generation i7 with 32 GB of RAM.  The
> only semi-odd thing is that I run ZFS.  Less odd, the nextcloud sync
> client and syncthing.  It was crashy on NetBSD 10, but was solid on
> NetBSD 11 as soon as I updated.  (11 has fixes for flushing dirty mmap'd
> pages and some other locking issues, so this is not surprising.) I've
> been updating every month or so along NetBSD 11.
> 
> I was rebuilding NetBSD on various branches, one at a time with -j2
> (should be not really noticeable).  I noticed firefox was very laggy,
> and then I noticed in top that the system was io bound and paging hard.
> Wired memory had begun to consume 75% of RAM.
> 
>   Memory: 307M Act, 121M Inact, 24G Wired, 52M Exec, 306M File, 343M Free
>   Swap: 40G Total, 660M Used, 39G Free / Pools: 6949M Used / Network: 4K In, 3K Out
> 
> After rebooting, it was "only" a few hundred MB.

I had something similar:
https://mail-index.netbsd.org/current-users/2026/07/22/msg047762.html

it occured several times, but I was running a -11 kernel with a -10
userland. I'm quite confident that this was triggered by firefox. I never
noticed this while I was running a -10 kernel; and I've not seen it since I
updated userland to -11.

My CPU and graphic card is
cpu0: highest basic info 00000016
cpu0: highest extended info 80000008
cpu0: "Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz"
cpu0: Intel 7th or 8th gen Core (Kaby Lake, Coffee Lake) or Xeon E (Coffee Lake) (686-class), 2808.00 MHz

So looks similar to yours.
Even after upgrading userland to -11 I have lots of crashes related to
graphic activity (not always kernel crashes but X11 was going out of
control). I added
        Option     "AccelMethod" "UXA"          # <str>

in xorg.conf and now it's stable again (I have 34 days of uptime now).

With -11 I use the native Xorg, with -10 it was pkgsrc's one

> 
>   Memory: 12G Act, 777M Inact, 2070M Wired, 523M Exec, 9301M File, 3701M Free
>   Swap: 40G Total, 40G Free / Pools: 12G Used / Network: 10K In, 6K Out
> 
> which is not trouble yet but heading in the wrong direction.  I had not
> started syncthing, trying to simplify.


Just now I have:
Memory: 5413M Act, 2375M Inact, 66M Wired, 371M Exec, 1646M File, 1981M Free
Swap: 15G Total, 10G Used, 5198M Free / Pools: 4983M Used / Network: 21K In, 8K

with a X session running for 34 days. firefox is still crashing occasionally

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--