[patch -mm] mm, hugetlb: schedule when potentially allocating many hugepages

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



A few hugetlb allocators loop while calling the page allocator and can
potentially prevent rescheduling if the page allocator slowpath is not
utilized.

Conditionally schedule when large numbers of hugepages can be allocated.

Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
---
 Based on -mm only to prevent merge conflicts with
 "mm/hugetlb.c: warn the user when issues arise on boot due to hugepages"

 mm/hugetlb.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1754,6 +1754,7 @@ static int gather_surplus_pages(struct hstate *h, int delta)
 			break;
 		}
 		list_add(&page->lru, &surplus_list);
+		cond_resched();
 	}
 	allocated += i;
 
@@ -2222,6 +2223,7 @@ static void __init hugetlb_hstate_alloc_pages(struct hstate *h)
 		} else if (!alloc_fresh_huge_page(h,
 					 &node_states[N_MEMORY]))
 			break;
+		cond_resched();
 	}
 	if (i < h->max_huge_pages) {
 		char buf[32];
@@ -2364,6 +2366,7 @@ 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;

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]
  Powered by Linux