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| author |   Alexander Duyck <alexander.h.duyck@redhat.com> | 2015-07-27 13:08:06 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-07-27 14:29:11 -0700 |
| commit | 1513069edcf8dd86cfd8d5daef482b97d6b93df6 (patch) | |
| tree | e1a68f3db60e7642afe71a732f213b73d55e0663 /net/ipv4/fib_trie.c | |
| parent | macb: Fix build with macro'ized readl/writel. (diff) | |
| download | linux-dev-1513069edcf8dd86cfd8d5daef482b97d6b93df6.tar.xz linux-dev-1513069edcf8dd86cfd8d5daef482b97d6b93df6.zip | |
fib_trie: Drop unnecessary calls to leaf_pull_suffix
It was reported that update_suffix was taking a long time on systems where
a large number of leaves were attached to a single node. As it turns out
fib_table_flush was calling update_suffix for each leaf that didn't have all
of the aliases stripped from it. As a result, on this large node removing
one leaf would result in us calling update_suffix for every other leaf on
the node.
The fix is to just remove the calls to leaf_pull_suffix since they are
redundant as we already have a call in resize that will go through and
update the suffix length for the node before we exit out of
fib_table_flush or fib_table_flush_external.
Reported-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Tested-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_trie.c')
| -rw-r--r-- | net/ipv4/fib_trie.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 81797e065b21..37c4bb89a708 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1793,8 +1793,6 @@ void fib_table_flush_external(struct fib_table *tb) if (hlist_empty(&n->leaf)) { put_child_root(pn, n->key, NULL); node_free(n); - } else { - leaf_pull_suffix(pn, n); } } } @@ -1864,8 +1862,6 @@ int fib_table_flush(struct fib_table *tb) if (hlist_empty(&n->leaf)) { put_child_root(pn, n->key, NULL); node_free(n); - } else { - leaf_pull_suffix(pn, n); } } |