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Fix boot time pmap_growkernel panic for case where vm is allocated >= 768M

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MFC after:	1 month
This commit is contained in:
Kip Macy 2008-08-21 02:57:02 +00:00
parent 83b92f6e47
commit 4e683d7252
1 changed files with 3 additions and 1 deletions
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4
sys/i386/xen/pmap.c
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@ -1910,13 +1910,15 @@ pmap_growkernel(vm_offset_t addr)
pmap_zero_page(nkpg);
ptppaddr = VM_PAGE_TO_PHYS(nkpg);
newpdir = (pd_entry_t) (ptppaddr | PG_V | PG_RW | PG_A | PG_M);
vm_page_lock_queues();
PD_SET_VA(kernel_pmap, (kernel_vm_end >> PDRSHIFT), newpdir, TRUE);
mtx_lock_spin(&allpmaps_lock);
LIST_FOREACH(pmap, &allpmaps, pm_list)
PD_SET_VA(pmap, (kernel_vm_end >> PDRSHIFT), newpdir, TRUE);
mtx_unlock_spin(&allpmaps_lock);
vm_page_unlock_queues();
kernel_vm_end = (kernel_vm_end + PAGE_SIZE * NPTEPG) & ~(PAGE_SIZE * NPTEPG - 1);
if (kernel_vm_end - 1 >= kernel_map->max_offset) {
kernel_vm_end = kernel_map->max_offset;