Date: Fri, 21 Feb 2014 11:32:36 +0200 From: Ian FREISLICH <ianf@clue.co.za> To: Hiroki Sato <hrs@FreeBSD.org> Cc: current@FreeBSD.org Subject: Re: netstat: sysctl: net.route.0.0.dump.0: Cannot allocate memory Message-ID: <E1WGmTE-0000nr-Us@clue.co.za> In-Reply-To: <20140221.182037.200669298555875226.hrs@allbsd.org> References: <20140221.182037.200669298555875226.hrs@allbsd.org> <20140221.172017.821481836359198829.hrs@allbsd.org> <E1WGkzK-0000gb-E2@clue.co.za> <E1WGltZ-0000kf-1A@clue.co.za>
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Hiroki Sato wrote:
> Hm, how about the attached one?
>
> I think the cause is just a race when length of the sysctl's output
> is changed in kernel after the buffer allocation in userspace, not
> memory shortage. Size of the routing table can quickly change.
You are correct. It's growing at about 9000 entries per second (I
wish it were faster).
This is what the output looks like now. I guess I'm not the average
case.
[firewall1.jnb1] ~ # netstat -rn |wc -l
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: sysctl: net.route.0.0.dump.0: Cannot allocate memory
1
[firewall1.jnb1] ~ # netstat -rn |wc -l
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
314032
[firewall1.jnb1] ~ # netstat -rn |wc -l
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
332293
[firewall1.jnb1] ~ # netstat -rn |wc -l
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
340368
[firewall1.jnb1] ~ # netstat -rn |wc -l
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
374400
[firewall1.jnb1] ~ # netstat -rn |wc -l
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: Routing table grew, retrying
netstat: sysctl: net.route.0.0.dump.0: Cannot allocate memory
1
[firewall1.jnb1] ~ # netstat -rn |wc -l
480073
Ian
--
Ian Freislich
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