diff options
Diffstat (limited to 'mm/khugepaged.c')
| -rw-r--r-- | mm/khugepaged.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 1cd18e4347fe..b7e2268dfc9a 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1673,10 +1673,14 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, spin_unlock(&khugepaged_mm_lock); mm = mm_slot->mm; - down_read(&mm->mmap_sem); - if (unlikely(khugepaged_test_exit(mm))) - vma = NULL; - else + /* + * Don't wait for semaphore (to avoid long wait times). Just move to + * the next mm on the list. + */ + vma = NULL; + if (unlikely(!down_read_trylock(&mm->mmap_sem))) + goto breakouterloop_mmap_sem; + if (likely(!khugepaged_test_exit(mm))) vma = find_vma(mm, khugepaged_scan.address); progress++; |