It seems a simple mistake was made when converting follow_hugetlb_page()
over to the VM_FAULT flags bitmask stuff:
(commit 83c54070ee1a2d05c89793884bea1a03f2851ed4).
By using the wrong bitmask, hugetlb_fault() failures are not being
recognized. This results in an infinite loop whenever
follow_hugetlb_page is involved in a failed fault.
Signed-off-by: Adam Litke <[email protected]>
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d7ca59d..de4cf45 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -643,7 +643,7 @@ int follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
spin_unlock(&mm->page_table_lock);
ret = hugetlb_fault(mm, vma, vaddr, 0);
spin_lock(&mm->page_table_lock);
- if (!(ret & VM_FAULT_MAJOR))
+ if (!(ret & VM_FAULT_ERROR))
continue;
remainder = 0;
--
Adam Litke - (agl at us.ibm.com)
IBM Linux Technology Center
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