Date: Fri, 05 May 2000 22:54:23 -0600 From: Warner Losh <imp@village.org> To: Jin Guojun (FTG staff) <jin@george.lbl.gov> Cc: bright@wintelcom.net, hackers@FreeBSD.ORG Subject: Re: Can NMI drop a hanging FreeBSD kernel into DDB? Message-ID: <200005060454.WAA59261@harmony.village.org> In-Reply-To: Your message of "Fri, 05 May 2000 12:50:34 PDT." <200005051950.MAA28377@george.lbl.gov> References: <200005051950.MAA28377@george.lbl.gov>
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In message <200005051950.MAA28377@george.lbl.gov> Jin Guojun writes: : In a normal operation, both work well. When system hangs, neither of them : works. It looks that system is in some wiered status. : : Does any one happen to know how to trace this kind of problem? PCI bus analizer is one way. Another is to have an ICE that will tell you the last value of the progam counter. Without some sort of hardware assist, these thing can be very hard to track down. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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