Date: Tue, 7 Mar 1995 14:41:13 -0500 From: "Paul F. Werkowski" <pw@snoopy.MV.COM> To: hackers@FreeBSD.org Subject: SYSV{SHM|MSG} kills network?? Message-ID: <199503071941.OAA01546@snoopy.mv.com>
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Here is a strange problem to which I hope someone on this list knows the answer. <trials and tribulations leading up to discovery omitted.> I was running a stock 2.0 kernel connected to ethernet by DE435 PCI NIC. Kernel was also built with SYSVSHM. This system got along just fine on our small LAN. A few weeks ago I added options SYSVMSG and SYSVSEM and rebuilt the kernel. The new system then had network problems which caused repeated NFS hangs, etc. Ping from the FreeBSD box to any other system resulted in OK performance for about 45 seconds followed by 45 seconds of lost packets, followed by 45 seconds of ok response, followed by 45 seconds of lost packets, etc.. From TCPDUMP it appeared that nothing was received for about 50% of the time. Rebuilding the kernel without SYSVMSG and SYSVSEM returned the network to OK performance. So, is this fixed in -current or can anyone confirm this behavior? Paul
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