diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2020-01-15 12:25:50 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2020-02-07 11:32:27 +0100 |
| commit | f2b18baca9539c6a3116d48b70972c7a2ba5d766 (patch) | |
| tree | 35a61cd2351716f3c4c5301a4bb95c295a0072ac | |
| parent | df373702bc0f8f2d83980ea441e71639fc1efcf8 (diff) | |
mac80211: use more bits for ack_frame_id
It turns out that this wasn't a good idea, I hit a test failure in
hwsim due to this. That particular failure was easily worked around,
but it raised questions: if an AP needs to, for example, send action
frames to each connected station, the current limit is nowhere near
enough (especially if those stations are sleeping and the frames are
queued for a while.)
Shuffle around some bits to make more room for ack_frame_id to allow
up to 8192 queued up frames, that's enough for queueing 4 frames to
each connected station, even at the maximum of 2007 stations on a
single AP.
We take the bits from band (which currently only 2 but I leave 3 in
case we add another band) and from the hw_queue, which can only need
4 since it has a limit of 16 queues.
Fixes: 6912daed05e1 ("mac80211: Shrink the size of ack_frame_id to make room for tx_time_est")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20200115122549.b9a4ef9f4980.Ied52ed90150220b83a280009c590b65d125d087c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | include/net/mac80211.h | 11 | ||||
| -rw-r--r-- | net/mac80211/cfg.c | 2 | ||||
| -rw-r--r-- | net/mac80211/tx.c | 2 |
3 files changed, 7 insertions, 8 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index aa145808e57a..77e6b5a83b06 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1004,12 +1004,11 @@ ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) struct ieee80211_tx_info { /* common information */ u32 flags; - u8 band; - - u8 hw_queue; - - u16 ack_frame_id:6; - u16 tx_time_est:10; + u32 band:3, + ack_frame_id:13, + hw_queue:4, + tx_time_est:10; + /* 2 free bits */ union { struct { diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 000c742d0527..6aee699deb28 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -3450,7 +3450,7 @@ int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb, spin_lock_irqsave(&local->ack_status_lock, spin_flags); id = idr_alloc(&local->ack_status_frames, ack_skb, - 1, 0x40, GFP_ATOMIC); + 1, 0x2000, GFP_ATOMIC); spin_unlock_irqrestore(&local->ack_status_lock, spin_flags); if (id < 0) { diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 4bd1faf4f779..87def9cb91ff 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2442,7 +2442,7 @@ static int ieee80211_store_ack_skb(struct ieee80211_local *local, spin_lock_irqsave(&local->ack_status_lock, flags); id = idr_alloc(&local->ack_status_frames, ack_skb, - 1, 0x40, GFP_ATOMIC); + 1, 0x2000, GFP_ATOMIC); spin_unlock_irqrestore(&local->ack_status_lock, flags); if (id >= 0) { |