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Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!agate!doc.ic.ac.uk!pipex!uknet!mcsun!sunic!isgate!veda.is!adam From: adam@veda.is (Adam David) Newsgroups: comp.os.386bsd.questions Subject: Re: Anyone using a Cyrix 486DLC? Keywords: 486DLC cyrix problems! Message-ID: <C5Hoo5.10v@veda.is> Date: 14 Apr 93 19:55:16 GMT References: <mgb.734759910@newsroom.utas.edu.au> Organization: Veda Systems, Iceland Lines: 32 mgb@geo.geol.utas.edu.au (Michael G. Brown) writes: >Has anyone out there successfully installed 386BSD with the >Cyrix 486DLC processor? Yes, it has not been troublefree, but I do not suspect the CPU. Cache invalidation is not performed on DMA reads, neither for the external nor for the internal cache (at least that is the diagnosis, highly likely). My system has stayed up anything from crashing during or immediately after boot, to around 10 days at a time, and anywhere inbetween. Some of this may be due to kernel or software bugs, but the motherboard is the main culprit. This will hopefully be taken care of in the new VM code, due sometime later. In the meantime I am anxiously waiting to see what Bruce's VM patches are going to take care of in the 0.2.3 patchkit. >I am just in the process of trying this, but I everything hangs >when it comes to newfs my drives. On a completely unpatched system, anything which caused multiple file access would crash my machine. Particular examples include: 'find /', 'for file in $large_directory/*; do $anything $file; done', 'make $non-trivial' (think of all those little *.h files), and so forth. Also it did happen sometimes, that the 'fsck -p' on bootup crashed irregularly, this has become increasingly rare with high patchlevels (booting is usually painless but random crashes still happen). Good luck, intrepid traveller. -- Adam D. (adam@veda.is)