Date: Tue, 1 Apr 1997 13:09:00 -0600 (CST) From: Geoff Mohler <gemohler@c-com.net> To: "John S. Dyson" <toor@dyson.iquest.net> Cc: current@freebsd.org Subject: Re: Bounce Buffers Message-ID: <Pine.BSF.3.91.970401130747.10066A-100000@dyslexic.phoenix.net> In-Reply-To: <199704011752.MAA02576@dyson.iquest.net>
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On Tue, 1 Apr 1997, John S. Dyson wrote: > > I was getting this on a stock 2.2.1 installation: > > > > Panic: Bounce Buffers Out Of Range > > =-=-=-=-=- > > > > I got this when I took the GENERIC *or any* Kernel definition file, and > > added the line: > > options "MAXMEM=262144" > > > > Then it would report the above error on bootup, just after reporting > > kernel bus options. > > > > Now, the problem only went away after removing a megabyte of ram. When I > > changed it to: > > options "MAXMEM=261120" > > > > ..it works fine. > > > You can also remove the bounce-buffers define. Those aren't usually needed > with new technology hardware. Yes, even with and without the: options BOUNCE_BUFFERS ...it still did the same thing. Note: Worked with Rod Grimes on this issue. > The problem is that the kernel takes so much space, that there isn't room > <16MB for bounce buffers. Unless we get lots of users with > 128M using > ISA SCSI adaptors, I don't think that it is worth fixing the memory > allocation code, until we create physical memory type attributes. Interesting note..but this still happens with and without the bounce_buffers option. =-=-=-=-=- ROMANI ITE DOMUM Geoff Mohler Operations Engineer Charter Communications/Phoenix Data Net
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