Date: Tue, 24 Jun 2014 09:40:15 -0600 From: Alan Somers <asomers@freebsd.org> To: Stefan Stere <icetor.is@bitmessage.ro> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Alon Ronen <aronen@juniper.net> Subject: Re: [zone: Mbuf_cluster] kern.ipc.nmbclusters limit reached in Virtual machine causes downtime Message-ID: <CAOtMX2h=D9%2B91Um42ZysVV%2BBCEcLdJfDA4voM9LL3mcdJuR=WA@mail.gmail.com> In-Reply-To: <1403600001.74170.YahooMailNeo@web162506.mail.bf1.yahoo.com> References: <1403600001.74170.YahooMailNeo@web162506.mail.bf1.yahoo.com>
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--001a11c38118b10b7204fc96c60f Content-Type: text/plain; charset=UTF-8 On Tue, Jun 24, 2014 at 2:53 AM, Stefan Stere <icetor.is@bitmessage.ro> wrote: > Hi, > > I have a vmware virtual server running FreeBSD 10.0 STABLE > The virtual server has 100mbps port. > > It is running a Tor router, consuming an average of 6-7 TB of monthly traffic. Its the only purpose of the server. > > Last night it went down, and vmware console log was saying: > [zone: Mbuf_cluster] kern.ipc.nmbclusters limit reached > > > I don't know what this means - the traffic of the server is unlimited and nothing is capped in any way. What can I do to fix this? I have read on freebsd wiki that I might need to add some lines to sysctl ? can you please confirm? Thank you in advance. This might be related to a problem that Alon Ronen discovered. The kernel can leak mbufs when experiencing memory pressure, if you're using SOCK_DGRAM or SOCK_SEQPACKET Unix domain sockets (or even SOCK_STREAM if sending ancillary data). You could try the attached patch that Alon and I are working on. Even if the patch doesn't fix your problem, it would be interesting to see the output of "vmstat -z". -Alan --001a11c38118b10b7204fc96c60f Content-Type: text/plain; charset=US-ASCII; name="uipc_send.diff" Content-Disposition: attachment; filename="uipc_send.diff" Content-Transfer-Encoding: base64 X-Attachment-Id: f_hwtdorqd0 SW5kZXg6IHN5cy9rZXJuL3VpcGNfdXNycmVxLmMKPT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gc3lzL2tlcm4vdWlw Y191c3JyZXEuYwkocmV2aXNpb24gMjY3ODE4KQorKysgc3lzL2tlcm4vdWlwY191c3JyZXEuYwko d29ya2luZyBjb3B5KQpAQCAtOTcwLDEwICs5NzAsMTUgQEAKIAkJY2FzZSBTT0NLX1NUUkVBTToK IAkJCWlmIChjb250cm9sICE9IE5VTEwpIHsKIAkJCQlpZiAoc2JhcHBlbmRjb250cm9sX2xvY2tl ZCgmc28yLT5zb19yY3YsIG0sCi0JCQkJICAgIGNvbnRyb2wpKQorCQkJCSAgICBjb250cm9sKSkg ewogCQkJCQljb250cm9sID0gTlVMTDsKLQkJCX0gZWxzZQorCQkJCQltID0gTlVMTDsKKwkJCQl9 IGVsc2UKKwkJCQkJZXJyb3IgPSBFTk9CVUZTOworCQkJfSBlbHNlIHsKIAkJCQlzYmFwcGVuZF9s b2NrZWQoJnNvMi0+c29fcmN2LCBtKTsKKwkJCQltID0gTlVMTDsKKwkJCX0KIAkJCWJyZWFrOwog CiAJCWNhc2UgU09DS19TRVFQQUNLRVQ6IHsKQEAgLTk4Nyw4ICs5OTIsMTEgQEAKIAkJCSAqIGxl dmVsIHVwIHRoZSBzdGFjay4KIAkJCSAqLwogCQkJaWYgKHNiYXBwZW5kYWRkcl9ub3NwYWNlY2hl Y2tfbG9ja2VkKCZzbzItPnNvX3JjdiwKLQkJCQlmcm9tLCBtLCBjb250cm9sKSkKKwkJCQlmcm9t LCBtLCBjb250cm9sKSkgewogCQkJCWNvbnRyb2wgPSBOVUxMOworCQkJCW0gPSBOVUxMOworCQkJ fSBlbHNlCisJCQkJZXJyb3IgPSBFTk9CVUZTOwogCQkJYnJlYWs7CiAJCQl9CiAJCX0KQEAgLTEw MDksNyArMTAxNyw2IEBACiAJCQlzby0+c29fc25kLnNiX2ZsYWdzIHw9IFNCX1NUT1A7CiAJCVNP Q0tCVUZfVU5MT0NLKCZzby0+c29fc25kKTsKIAkJVU5QX1BDQl9VTkxPQ0sodW5wMik7Ci0JCW0g PSBOVUxMOwogCQlicmVhazsKIAogCWRlZmF1bHQ6Cg== --001a11c38118b10b7204fc96c60f--
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