[PATCH v4 net-next 07/19] rhashtable: add schedule points
From: Eric Dumazet <edumazet@google.com>
Date: 2018-03-31 19:59:29
Subsystem:
library code, rhashtable, the rest · Maintainers:
Andrew Morton, Thomas Graf, Herbert Xu, Linus Torvalds
Rehashing and destroying large hash table takes a lot of time, and happens in process context. It is safe to add cond_resched() in rhashtable_rehash_table() and rhashtable_free_and_destroy() Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> --- lib/rhashtable.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 47de025b624520f75e521bef46dc9b28baa6a1a0..2b2b79974b614a94e5325e8c2271804cb27069aa 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c@@ -333,6 +333,7 @@ static int rhashtable_rehash_table(struct rhashtable *ht) err = rhashtable_rehash_chain(ht, old_hash); if (err) return err; + cond_resched(); } /* Publish the new table pointer. */
@@ -1112,6 +1113,7 @@ void rhashtable_free_and_destroy(struct rhashtable *ht, for (i = 0; i < tbl->size; i++) { struct rhash_head *pos, *next; + cond_resched(); for (pos = rht_dereference(*rht_bucket(tbl, i), ht), next = !rht_is_a_nulls(pos) ? rht_dereference(pos->next, ht) : NULL;
--
2.17.0.rc1.321.gba9d0f2565-goog