The patch titled
Subject: mm, hugetlb: schedule when potentially allocating many hugepages
has been removed from the -mm tree. Its filename was
mm-hugetlb-schedule-when-potentially-allocating-many-hugepages.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: David Rientjes <rientjes@xxxxxxxxxx>
Subject: mm, hugetlb: schedule when potentially allocating many hugepages
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.
Anshuman: "Fixes a task which was getting hung while writing like 10000
hugepages (16MB on POWER8) into /proc/sys/vm/nr_hugepages."
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1706091535300.66176@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Tested-by: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN mm/hugetlb.c~mm-hugetlb-schedule-when-potentially-allocating-many-hugepages mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-schedule-when-potentially-allocating-many-hugepages
+++ a/mm/hugetlb.c
@@ -1781,6 +1781,7 @@ retry:
break;
}
list_add(&page->lru, &surplus_list);
+ cond_resched();
}
allocated += i;
@@ -2249,6 +2250,7 @@ static void __init hugetlb_hstate_alloc_
} else if (!alloc_fresh_huge_page(h,
&node_states[N_MEMORY]))
break;
+ cond_resched();
}
if (i < h->max_huge_pages) {
char buf[32];
_
Patches currently in -mm which might be from rientjes@xxxxxxxxxx are
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