Date: Fri, 02 Oct 2009 14:06:21 -0400 From: Skip Ford <skip@menantico.com> To: Igor Sysoev <is@rambler-co.ru> Cc: freebsd-net@freebsd.org Subject: Re: stuck TIME_WAIT sockets Message-ID: <20091002180621.GA1168@menantico.com> In-Reply-To: <20091002130646.GC89571@rambler-co.ru> References: <20091002130646.GC89571@rambler-co.ru>
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Igor Sysoev wrote: > The TIME_WAIT sockets suddenly started to grow on a host running > FreeBSD 7.2-STABLE, date=2009.09.06.23.59.59 > Usually there are 3,000-5,000 TIME_WAIT sockets on the host. > However, today they stared to grow, have reached 110,000 sockets in hour > and still remain on this level. > net.inet.tcp.msl is 30000. > The host uptime is 24 days, 21:53. Perhaps you need this patch? Author: peter Date: Thu Aug 20 22:53:28 2009 New Revision: 196410 URL: http://svn.freebsd.org/changeset/base/196410 Log: Fix signed comparison bug when ticks goes negative after 24 days of uptime. This causes the tcp time_wait state code to fail to expire sockets in timewait state. Approved by: re (kensmith) Modified: head/sys/netinet/tcp_timewait.c Modified: head/sys/netinet/tcp_timewait.c --- head/sys/netinet/tcp_timewait.c Thu Aug 20 22:39:20 2009 (r196409) +++ head/sys/netinet/tcp_timewait.c Thu Aug 20 22:53:28 2009 (r196410) @@ -603,7 +603,7 @@ tcp_tw_2msl_scan(int reuse) INP_INFO_WLOCK_ASSERT(&V_tcbinfo); for (;;) { tw = TAILQ_FIRST(&V_twq_2msl); - if (tw == NULL || (!reuse && tw->tw_time > ticks)) + if (tw == NULL || (!reuse && (tw->tw_time - ticks) > 0)) break; INP_WLOCK(tw->tw_inpcb); tcp_twclose(tw, reuse); -- Skip
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