net: sched: don't release block->lock when dumping chains

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Function tc_dump_chain() obtains and releases block->lock on each iteration
of its inner loop that dumps all chains on block. Outputting chain template
info is fast operation so locking/unlocking mutex multiple times is an
overhead when lock is highly contested. Modify tc_dump_chain() to only
obtain block->lock once and dump all chains without releasing it.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Suggested-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Vlad Buslov 2019-02-25 17:45:44 +02:00 • committed by David S. Miller

parent 6676d5e416

commit ace4a267e8

1 changed files with 7 additions and 9 deletions

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net/sched/cls_api.c

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