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mac80211: optimise AP stop RCU handling

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If there are VLANs, stopping an AP is inefficient as it
calls rcu_barrier() once for each interface (the VLANs
and the AP itself). Optimise this by moving rcu_barrier()
out of the station cleanups and calling it only once for
all interfaces combined.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2012-12-14 14:56:03 +01:00
parent 361c9c8b0e
commit 75de9113bb
4 changed files with 29 additions and 9 deletions
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2
net/mac80211/sta_info.c
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@@ -920,8 +920,6 @@ int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata)
void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata)
{
rcu_barrier();
ieee80211_cleanup_sdata_stas(sdata);
cancel_work_sync(&sdata->cleanup_stations_wk);
}