Date: Thu, 27 May 2010 01:02:38 +0200 From: "K. Macy" <kmacy@freebsd.org> To: Brandon Gooch <jamesbrandongooch@gmail.com> Cc: freebsd-net@freebsd.org, Kurt Jaeger <pi@opsec.eu>, Kip Macy <kip.macy@gmail.com> Subject: Re: kern/146792: [flowtable] flowcleaner 100% cpu's core load Message-ID: <AANLkTilbErPlSd2zkWnLFH_MzBfxhRnndf3wMh0moHYc@mail.gmail.com> In-Reply-To: <AANLkTikXrtkLUswmjRpmAvWOQqOj-snwp4cYbBUUgR0d@mail.gmail.com> References: <201005232206.o4NM6gor016873@freefall.freebsd.org> <AANLkTikXrtkLUswmjRpmAvWOQqOj-snwp4cYbBUUgR0d@mail.gmail.com>
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This has since been fixed. However, with 8.0 the simplest fix is to turn flowtable off. sysctl net.inet.flowtable.enable=3D0 -Kip On Mon, May 24, 2010 at 4:54 AM, Brandon Gooch <jamesbrandongooch@gmail.com> wrote: > On Sun, May 23, 2010 at 5:06 PM, Kurt Jaeger <pi@opsec.eu> wrote: >> The following reply was made to PR kern/146792; it has been noted by GNA= TS. >> >> From: Kurt Jaeger <pi@opsec.eu> >> To: bug-followup@FreeBSD.org, niko@gtelecom.ru >> Cc: >> Subject: Re: kern/146792: [flowtable] flowcleaner 100% cpu's core load >> Date: Sun, 23 May 2010 16:19:25 +0200 >> >> =A0Hi! >> >> =A0I observe a similar behaviour on a 8.0-RELEASE-p2 i386 GENERIC >> =A0kernel. >> >> =A0System receives 2 BGP4 fullfeeds (approx. 310K routes each). >> >> =A0The system is still running, a few processes are unkillable or >> =A0die only after a long amount (1-2h) of time. >> >> =A0Here's the list of unkillable processes: >> >> =A080871 =A0?? =A0R =A0 =A0 =A00:00.00 /bin/sh /etc/periodic/daily/470.s= tatus-named >> =A076499 =A0?? =A0Rs =A0 =A0 0:00.01 sshd: [accepted] (sshd) >> =A076922 =A0?? =A0Rs =A0 =A0 0:00.01 sshd: [accepted] (sshd) >> >> =A0flowcleaner looks pretty busy (for an uptime of approx. 40h): >> >> =A0 =A022 =A0?? =A0RL =A0 1209:50.98 [flowcleaner] >> >> =A04:17PM =A0up 1 day, 22:22, 2 users, load averages: 7.20, 6.53, 5.81 >> >> =A0quagga is running on the system, bgpd mgmt cli is no longer reachable= : >> >> =A0# telnet 0 2605 >> =A0Trying 0.0.0.0... >> =A0Connected to 0. >> =A0Escape character is '^]'. >> >> =A0^] >> =A0telnet> close >> =A0Connection closed. >> =A0# >> >> =A0What can I do to help to debug this ? >> =A0No console access available right now, but can probably made availabl= e. >> >> =A0This is a production host, but not yet super-critical, so... > > I know absolutely nothing about quagga, and very, very little about > the flowcleaner process (or flowtable, no man page), but I DO KNOW > that Kip Macy suggested disabling: > > options FLOWTABLE > > from the kernel config of the machine experiencing the issue. This was > back in December 2009, so I'm not sure about a resolution to the > actual problem (or if it is just inherent in the design of the per-cpu > routing cache). > > Perhaps Kip may have more insight? > > -Brandon > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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