Date: Wed, 14 Jan 2004 20:56:38 +1100 From: Rob B <robbyrnes@ozemail.com.au> To: Dmitry Morozovsky <marck@rinet.ru>, stable@freebsd.org Subject: Re: /kernel: ipfw: pullup failed Message-ID: <6.0.1.1.2.20040114205232.02382008@127.0.0.1> In-Reply-To: <20040113181214.C95352@woozle.rinet.ru> References: <20040113181214.C95352@woozle.rinet.ru>
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At 02:19 AM 14/01/2004, Dmitry Morozovsky wrote: >Dear colleagues, > >for last couple of hours I've encountered random TCP packets drops (most >visible as ssh sessions lockups) and random kernel messages about "pullup >failed" > >marck@gw-f:~> netstat -m >1051/1584/32768 mbufs in use (current/peak/max): > 1050 mbufs allocated to data > 1 mbufs allocated to packet headers >1047/1582/16384 mbuf clusters in use (current/peak/max) >3560 Kbytes allocated to network (8% of mb_map in use) >0 requests for memory denied >0 requests for memory delayed >0 calls to protocol drain routines > >Quick googling shows me >http://www.mail-archive.com/freebsd-net@freebsd.org/msg10291.html which >has not >been answered by luigi I've seen this happening as well, since you don't appeaer to be low on mbufs ... (from the ipfw man page:) "There are circumstances where fragmented datagrams are uncondition- ally dropped. TCP packets are dropped if they do not contain at least 20 bytes of TCP header, UDP packets are dropped if they do not contain a full 8 byte UDP header, and ICMP packets are dropped if they do not contain 4 bytes of ICMP header, enough to specify the ICMP type, code, and checksum. These packets are simply logged as ``pullup failed'' since there may not be enough good data in the packet to produce a meaningful log entry." Cheers, Rob -- He lived in such a low room he could only eat pancakes. This is random quote 549 of 1254. Distance from the centre of the brewing universe [15200.8 km (8207.8 mi), 262.8 deg](Apparent) Rennerian Public Key fingerprint = 6219 33BD A37B 368D 29F5 19FB 945D C4D7 1F66 D9C5
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