diff options
| -rw-r--r-- | mm/sparse.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 3abc8cc50201..691544a2814c 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -740,6 +740,15 @@ static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages) if (!memmap) return; + /* + * A further optimization is to have per section refcounted + * num_poisoned_pages. But that would need more space per memmap, so + * for now just do a quick global check to speed up this routine in the + * absence of bad pages. + */ + if (atomic_long_read(&num_poisoned_pages) == 0) + return; + for (i = 0; i < nr_pages; i++) { if (PageHWPoison(&memmap[i])) { atomic_long_sub(1, &num_poisoned_pages); |