Subject: kern/25339: VM subsystem broken.
To: None <gnats-bugs@gnats.NetBSD.org>
From: Denis Lagno <firstname.lastname@example.org>
Date: 04/27/2004 01:18:41
>Synopsis: starting jobs that allocates big chunks of swappable memory can hang up system
>Arrival-Date: Mon Apr 26 21:19:00 UTC 2004
>Originator: Denis Lagno
>Release: NetBSD 2.0E (Apr 25 snapshot)
System: NetBSD flamante.local.domain 2.0E NetBSD 2.0E (FLAMANTE) #0: Mon Apr 26 12:34:19 MSD 2004 email@example.com:/var/worksrc/netbsd-current/src/sys/arch/i386/compile/FLAMANTE i386
Earlier I filed PR kern/25315 "reproducible hangups when creating virtual screens in screen(1)"
I discovered that real reason of hangups was somewhere in swap subsystem.
Hangups occur always when I use swap (I use swap on cgd but swap on normal device
hangs as well) and have jobs allocating big chunks of memory.
Recently I bumped size of scrollback buffer in screen from 10000 to 100000 lines
so screen was such job in my case.
have some swap attached.
start some memory consuming activity.