Date: Tue, 20 Jan 2009 07:24:28 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/amd64/amd64 pmap.c src/sys/amd64/include pmap.h Message-ID: <200901200724.n0K7OXsA025760@repoman.freebsd.org>
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alc 2009-01-20 07:24:28 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/amd64/amd64 pmap.c
sys/amd64/include pmap.h
Log:
SVN rev 187465 on 2009-01-20 07:24:28Z by alc
MFC r179917,180333,180373,180378
Prepare for a larger kernel virtual address space. Specifically, once
KERNBASE and VM_MIN_KERNEL_ADDRESS are no longer the same, the physical
memory allocated during bootstrap will be offset from the low-end of the
kernel's page table.
Change create_pagetables() and pmap_init() so that many fewer page table
pages have to be preallocated by create_pagetables().
Eliminate pmap_growkernel()'s dependence on create_pagetables() preallocating
page directory pages from VM_MIN_KERNEL_ADDRESS through the end of the
kernel's bss. Specifically, the dependence was in pmap_growkernel()'s one-
time initialization of kernel_vm_end, not in its main body. (I could not,
however, resist the urge to optimize the main body.)
Reduce the number of preallocated page directory pages to just those needed
to support NKPT page table pages. (In fact, this allows me to revert a
couple of my earlier changes to create_pagetables().)
Fix lines that are too long in pmap_growkernel() by substituting shorter
but equivalent expressions.
Revision Changes Path
1.590.2.12 +29 -20 src/sys/amd64/amd64/pmap.c
1.138.2.3 +1 -2 src/sys/amd64/include/pmap.h
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