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Diffstat (limited to 'mm/swapfile.c')
-rw-r--r--mm/swapfile.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index f30438970cd1..1c6e0321205d 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1234,6 +1234,7 @@ static inline int unuse_pmd_range(struct vm_area_struct *vma, pud_t *pud,
pmd = pmd_offset(pud, addr);
do {
+ cond_resched();
next = pmd_addr_end(addr, end);
if (pmd_none_or_trans_huge_or_clear_bad(pmd))
continue;
@@ -1313,6 +1314,7 @@ static int unuse_mm(struct mm_struct *mm,
for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (vma->anon_vma && (ret = unuse_vma(vma, entry, page)))
break;
+ cond_resched();
}
up_read(&mm->mmap_sem);
return (ret < 0)? ret: 0;
@@ -1350,15 +1352,12 @@ static unsigned int find_next_to_unuse(struct swap_info_struct *si,
prev = 0;
i = 1;
}
- if (frontswap) {
- if (frontswap_test(si, i))
- break;
- else
- continue;
- }
count = READ_ONCE(si->swap_map[i]);
if (count && swap_count(count) != SWAP_MAP_BAD)
- break;
+ if (!frontswap || frontswap_test(si, i))
+ break;
+ if ((i % LATENCY_LIMIT) == 0)
+ cond_resched();
}
return i;
}