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inet: add a schedule point in inet_twsk_purge()

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On a large hash table, we can easily spend seconds to
walk over all entries. Add a cond_resched() to yield
cpu if necessary.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-03-18 17:40:51 -07:00 committed by David S. Miller
parent db19170bc0
commit 738e6d30d3
1 changed files with 1 additions and 0 deletions
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net/ipv4/inet_timewait_sock.c
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@ -487,6 +487,7 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo,
for (slot = 0; slot <= hashinfo->ehash_mask; slot++) {
struct inet_ehash_bucket *head = &hashinfo->ehash[slot];
restart_rcu:
cond_resched();
rcu_read_lock();
restart:
sk_nulls_for_each_rcu(sk, node, &head->chain) {