Date: Mon, 12 Feb 2018 11:30:32 -0700 From: Ian Lepore <ian@freebsd.org> To: Eugene Grosbein <eugen@grosbein.net>, Ask =?ISO-8859-1?Q?Bj=F8rn?= Hansen <ask@develooper.com> Cc: freebsd-stable@freebsd.org Subject: Re: FreeBSD on 64MB memory Message-ID: <1518460232.94819.25.camel@freebsd.org> In-Reply-To: <5A81D72A.7020408@grosbein.net> References: <5FB97479-C49D-4C6E-8416-015ECA656C14@develooper.com> <5A8123CE.9050609@grosbein.net> <C2042F56-2EB7-47B9-92C5-52DA21CA3132@develooper.com> <5A81D72A.7020408@grosbein.net>
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On Tue, 2018-02-13 at 01:04 +0700, Eugene Grosbein wrote: > 13.02.2018 0:38, Ask Bj¸rn Hansen wrote: > > > > > > > > > > > > > > I have an old Soekris system with 64MB memory that I upgraded from 10.3 to 11.1 recently. Since then it˙s started hanging every few days. > > > Please show output of commands: > > > > > > grep memory /var/run/dmesg.boot > > real memory = 67108864 (64 MB) > > avail memory = 42098688 (40 MB) > > > > The 24MB are for the kernel? I wonder my 11.1 kernel is less discriminating with what I compiled in... > You should be running custom kernel with absolute minimum. > For example, use "options NO_SWAPPING" to compile out swapping code if your system > cannot have any swap area. > > > > > > > > > top -ores -d1 > > Shortly after boot: > > > > last pid: 1008; load averages: 0.57, 0.62, 0.53 up 0+00:19:31 06:24:50 > > 8 processes: 1 running, 7 sleeping > > CPU: % user, % nice, % system, % interrupt, % idle > > Mem: 9084K Active, 3644K Inact, 29M Wired, 4862K Buf, 492K Free > > Swap: > > > > PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND > > 911 root 1 22 0 8816K 8844K select 0:39 4.20% ntpd > Your Soekris system can live without bloated ntpd, use ntpdate or try sntp > to periodically check your clock with cron, unless you need to re-distribute > NTP to your LAN. > Heh. I think 1) you don't realize you're saying "you don't need ntpd" to, and 2) you didn't notice the hostname of the system in some of the debugging output (ntp1.us.grundclock.com). :) 24MB physmem gone before the kernel even starts seems a little much. I wonder if some amount of that is being eaten up by a video frame buffer that maybe isn't needed on a headless system? -- Ian
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