From: Joern Engel <jo...@logfs.org>
~150ms scheduler latency for both observed in the wild.
Signed-off-by: Joern Engel <jo...@logfs.org>
Signed-off-by: Spencer Baugh <sba...@catern.com>
---
mm/hugetlb.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index a8c3087..2eb6919 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1836,6 +1836,7 @@ static unsigned long set_max_huge_pages(struct hstate *h,
unsigned long count,
ret = alloc_fresh_gigantic_page(h, nodes_allowed);
else
ret = alloc_fresh_huge_page(h, nodes_allowed);
+ cond_resched();
spin_lock(&hugetlb_lock);
if (!ret)
goto out;
@@ -3521,6 +3522,7 @@ long follow_hugetlb_page(struct mm_struct *mm, struct
vm_area_struct *vma,
spin_unlock(ptl);
ret = hugetlb_fault(mm, vma, vaddr,
(flags & FOLL_WRITE) ? FAULT_FLAG_WRITE : 0);
+ cond_resched();
if (!(ret & VM_FAULT_ERROR))
continue;
--
2.5.0.rc3
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