Date: Mon, 23 Mar 2009 20:42:11 GMT From: Vladimir Kobal <vlad@prokk.net> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/132984: [netgraph] swi1: net 100% cpu usage Message-ID: <200903232042.n2NKgBAt071328@www.freebsd.org> Resent-Message-ID: <200903232050.n2NKo33w004095@freefall.freebsd.org>
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>Number: 132984 >Category: kern >Synopsis: [netgraph] swi1: net 100% cpu usage >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Mar 23 20:50:03 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Vladimir Kobal >Release: 7.1-STABLE >Organization: ProKK SE >Environment: FreeBSD test.prokk.net 7.1-STABLE FreeBSD 7.1-STABLE #0: Sat Feb 28 13:19:11 EET 2009 root@test.prokk.net:/usr/src/sys/amd64/compile/TEST amd64 >Description: The system is a NAS: mpd 5.2 (PPTP), SMP, em (pci-e) interfaces. Dummynet, divert and pf are disabled in the kernel. NAT and shaping aren't used. Periodically (from 2 minutes up to 2 weeks) the system hangs with swi1: net 100% cpu usage. While swi1: net (netgraph) is using 100% of CPU time m_tag_locate() and ng_iface_output() are constantly called from the infinite loop according to the hwpmc stats. The problem's appearance rate doesn't depend on cpu/users/traffic load. Related to http://lists.freebsd.org/pipermail/freebsd-net/2009-February/021120.html >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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