From: Mel Gorman <[EMAIL PROTECTED]>
Similar to morecore, it is necessary to prefault regions allocated by
get_huge_pagess() when requested.
Signed-off-by: Mel Gorman <[EMAIL PROTECTED]>
---
alloc.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/alloc.c b/alloc.c
index 596c3c1..197c1ce 100644
--- a/alloc.c
+++ b/alloc.c
@@ -102,6 +102,16 @@ void *get_huge_pages(size_t len, ghp_t flags)
return NULL;
}
+ /* Fault the region to ensure accesses succeed */
+ if (__lh_hugetlbfs_prefault(heap_fd, buf, len) != 0) {
+ munmap(buf, len);
+ close(heap_fd);
+
+ /* Try falling back to base pages if allowed */
+ if (flags & GHP_FALLBACK)
+ return fallback_base_pages(len, flags);
+ }
+
/* Close the file so we do not have to track the descriptor */
if (close(heap_fd) != 0) {
WARNING("Failed to close new heap fd: %s\n", strerror(errno));
--
1.5.6.3
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