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Increase VM_KERNEL_PT_PAGES from 2 to 4 for x68k. 

X68030 with 8MB or 12MB RAM (which is default for most X68030s)
now gets "pmap_enter_ptpage: can't get KPT page" panic again
with VM_KERNEL_PT_PAGES=2 while it works with >=14MB.
3 is enough to boot for now, but I also add a spare.

I guess this is because the post netbsd-6 vmem(9) bootstrap
changes require more kernel memory before MD pmap_init().

Note1:	netbsd-6 (which also pulls physmem detection changes
	that affect nptpages) doesn't have this problem.
Note2:	other hp300 pmap based m68k ports might have the same issue,
	but at least 12MB luna68k works with VM_KERNEL_PT_PAGES=2
	so I think it depends on kernel size and/or iomapsize.
This commit is contained in:
tsutsui 2014-01-25 00:07:48 +00:00
parent 80628d62e4
commit b80737e133
1 changed files with 2 additions and 2 deletions
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4
sys/arch/x68k/include/vmparam.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: vmparam.h,v 1.35 2012/01/21 20:19:55 tsutsui Exp $ */
/* $NetBSD: vmparam.h,v 1.36 2014/01/25 00:07:48 tsutsui Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -107,7 +107,7 @@
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
/* # of kernel PT pages (initial only, can grow dynamically) */
#define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */
#define VM_KERNEL_PT_PAGES ((vsize_t)4) /* XXX: SYSPTSIZE */
/*
* Constants which control the way the VM system deals with memory segments.