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vm_create_anonymous_area(): Optimized the B_32_BIT_{FULL_LOCK,CONTIGUOUS} 

cases for B_HAIKU_PHYSICAL_BITS > 32 and accessible physical memory < 4 GB.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37231 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2010-06-23 13:55:44 +00:00
parent b46540452a
commit ef4fd448b5
1 changed files with 9 additions and 5 deletions
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14
src/system/kernel/vm/vm.cpp
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@ -1124,18 +1124,22 @@ vm_create_anonymous_area(team_id team, const char *name, addr_t size,
doReserveMemory = true;
break;
case B_32_BIT_FULL_LOCK:
#if B_HAIKU_PHYSICAL_BITS <= 32
if (B_HAIKU_PHYSICAL_BITS <= 32
|| (uint64)vm_page_max_address() < (uint64)1 << 32) {
wiring = B_FULL_LOCK;
doReserveMemory = true;
break;
#endif
}
// TODO: We don't really support this mode efficiently. Just fall
// through for now ...
case B_32_BIT_CONTIGUOUS:
#if B_HAIKU_PHYSICAL_BITS > 32
stackPhysicalRestrictions = *physicalAddressRestrictions;
stackPhysicalRestrictions.high_address = 0x100000000LL;
physicalAddressRestrictions = &stackPhysicalRestrictions;
if (vm_page_max_address() >= (phys_addr_t)1 << 32) {
stackPhysicalRestrictions = *physicalAddressRestrictions;
stackPhysicalRestrictions.high_address
= (phys_addr_t)1 << 32;
physicalAddressRestrictions = &stackPhysicalRestrictions;
}
#endif
wiring = B_CONTIGUOUS;
doReserveMemory = true;