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Date: Fri, 30 Mar 2018 17:53:04 -0700 From: Eric Dumazet <edumazet@...gle.com> To: "David S . Miller" <davem@...emloft.net> Cc: netdev <netdev@...r.kernel.org>, Florian Westphal <fw@...len.de>, Herbert Xu <herbert@...dor.apana.org.au>, Thomas Graf <tgraf@...g.ch>, Jesper Dangaard Brouer <brouer@...hat.com>, Alexander Aring <alex.aring@...il.com>, Stefan Schmidt <stefan@....samsung.com>, Kirill Tkhai <ktkhai@...tuozzo.com>, Eric Dumazet <edumazet@...gle.com>, Eric Dumazet <eric.dumazet@...il.com> Subject: [PATCH v3 net-next 07/12] rhashtable: add schedule points 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@...gle.com> --- 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
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