On Fri, 17 May 1996 00:54:28 -0500 (CDT) 
 Jeff Thieleke <thieleke@lust.isca.uiowa.edu> wrote:

 > > Did you edit /usr/include/sys/param.h and increase MAXBSIZE, by any 
 > > chance? I got a "ptdi:" panic after upgrading from 16M to 48M, although 
 > > it happened after printing the "real mem  =" line. Recompiling a kernel 
 > > with MAXBSIZE set back down to the default 16384 fixed things for me...
 > 

look in arch/i386/include/... for the NKPDE constant ... if you increase 
that number (maybe double it), I think the ptdi panics will disappear 
with a higher MAXBSIZE...

However, making this number larger in the general case is not the correct 
solution, because it increases pmap overhead, which can be a real lose on 
systems without a lot of memory.

 > Yes!  Give the man a cupie doll!  I increased MAXBSIZE, ironically enough,
 > to avoid panics when accessing my DOS partitions.  Reducing it from
 > MAXPHYS to 16384 fixed my 32M panics, but I'm back to "allocbuf: buffer
 > larger than MAXBSIZE requested" panics when accessing DOS partitions.
 > Hopefully a compromise can be found now...
 > 
 > Thanks for the solution!
 > 
 > 
 > Jeff Thieleke
 > 

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