Date: Tue, 30 Mar 2004 14:23:40 -0500 From: scion+fbsdq@webrelay.net To: freebsd-questions@freebsd.org Subject: Re: Kernel: Panic problem with TCPDUMP Message-ID: <20040330192340.C395A38026@nimbus.webrelay.net> In-Reply-To: Your message of "Tue, 30 Mar 2004 13:46:06 -0300." <Sea2-F34gpsDGdZ1bDF0004124e@hotmail.com>
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From: "Guthemberg Silvestre" <gutho80@hotmail.com> Date: Tue, 30 Mar 2004 13:46:06 -0300 >Hi everyone, >I'm using the FreeBSD 5.2(FreeBSD 5.2-RELEASE #0: Sun Jan 11 04:21:45 GMT >2004),default installation, to collect packets with TCPDUMP. The computer >has: >-> CPU: AMD Athlon(tm) XP 2400+ (2004.56-MHz 686-class CPU) >-> real memory = 536805376 (511 MB) >-> rl0: <RealTek 8139 10/100BaseTX> port 0xd400-0xd4ff mem >0xdfffbf00-0xdfffbfff irq 18 at device 8.0 on pci0, etc. >The problem is when I start the program TCPDUMP to collect the packets from >a 32Mb/s link (at the rl0 interface). After some time, the following log >error messages appear: >"Mar 30 11:29:22 p2p kernel: panic: vm_fault: fault on nofault entry, addr: >e0aae000 >Mar 30 11:29:22 p2p kernel: cpuid = 0; >Mar 30 11:29:22 p2p kernel: >Mar 30 11:29:22 p2p kernel: syncing disks, buffers remaining... 3842 3842 >3842 3842 3842 3842 3842 3842 3842 3842 3842 3842 3842 3842 3842 38 >42 3842 3842 3842 3842 You don't by any chance have a Shuttle Xpc do you? Those are very similar dmesg lines to my Xpc. I have found that the memory boards are woefully undercooled in this box. I experimented with many coverings of the vent holes to increase the pressures near the front where the memory resides. Eventually I wedged a fan inside and aimed it along the two dimms. Runs fine now. Before that I had the *same* results as you whenever I ran software that exercised dma to disk, net, whatever. Which meant that the system often crashed the first time I read mail...
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