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There is no reason to perform the pmap_remove() on the kernel pmap while
the kmem object lock is held. Do the pmap_remove() before acquiring the kmem object lock. MFC after: 1 week Sponsored by: EMC / Isilon Storage Division
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=266588
@ -396,9 +396,9 @@ kmem_unback(vm_object_t object, vm_offset_t addr, vm_size_t size)
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KASSERT(object == kmem_object || object == kernel_object,
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("kmem_unback: only supports kernel objects."));
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pmap_remove(kernel_pmap, addr, addr + size);
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offset = addr - VM_MIN_KERNEL_ADDRESS;
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VM_OBJECT_WLOCK(object);
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pmap_remove(kernel_pmap, addr, addr + size);
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for (i = 0; i < size; i += PAGE_SIZE) {
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m = vm_page_lookup(object, OFF_TO_IDX(offset + i));
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vm_page_unwire(m, 0);
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