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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-06-09 02:09:23 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-11 18:37:08 -0700 |
| commit | c7de2cf053420d63bac85133469c965d4b1083e1 (patch) | |
| tree | b56f7c96d01e25f79fe1f9b7e5305265e92214d9 /net/core/gen_estimator.c | |
| parent | cbd6890c5987cd7115147e1dd2c10d729afabb08 (diff) | |
| download | talos-obmc-linux-c7de2cf053420d63bac85133469c965d4b1083e1.tar.gz talos-obmc-linux-c7de2cf053420d63bac85133469c965d4b1083e1.zip | |
pkt_sched: gen_kill_estimator() rcu fixes
gen_kill_estimator() API is incomplete or not well documented, since
caller should make sure an RCU grace period is respected before
freeing stats_lock.
This was partially addressed in commit 5d944c640b4
(gen_estimator: deadlock fix), but same problem exist for all
gen_kill_estimator() users, if lock they use is not already RCU
protected.
A code review shows xt_RATEEST.c, act_api.c, act_police.c have this
problem. Other are ok because they use qdisc lock, already RCU
protected.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/gen_estimator.c')
| -rw-r--r-- | net/core/gen_estimator.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c index 785e5276a300..9fbe7f7429b0 100644 --- a/net/core/gen_estimator.c +++ b/net/core/gen_estimator.c @@ -263,6 +263,7 @@ static void __gen_kill_estimator(struct rcu_head *head) * * Removes the rate estimator specified by &bstats and &rate_est. * + * Note : Caller should respect an RCU grace period before freeing stats_lock */ void gen_kill_estimator(struct gnet_stats_basic_packed *bstats, struct gnet_stats_rate_est *rate_est) |
