diff options
Diffstat (limited to 'package/madwifi/patches/342-performance.patch')
| -rw-r--r-- | package/madwifi/patches/342-performance.patch | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/package/madwifi/patches/342-performance.patch b/package/madwifi/patches/342-performance.patch new file mode 100644 index 000000000..88cec182d --- /dev/null +++ b/package/madwifi/patches/342-performance.patch @@ -0,0 +1,263 @@ +--- a/ath/if_ath.c ++++ b/ath/if_ath.c +@@ -3239,7 +3239,6 @@ ath_hardstart(struct sk_buff *skb, struc + struct ath_softc *sc = dev->priv; + struct ieee80211_node *ni = NULL; + struct ath_buf *bf = NULL; +- struct ether_header *eh; + ath_bufhead bf_head; + struct ath_buf *tbf, *tempbf; + struct sk_buff *tskb; +@@ -3251,6 +3250,7 @@ ath_hardstart(struct sk_buff *skb, struc + */ + int requeue = 0; + #ifdef ATH_SUPERG_FF ++ struct ether_header *eh; + unsigned int pktlen; + struct ieee80211com *ic = &sc->sc_ic; + struct ath_node *an; +@@ -3316,27 +3316,9 @@ ath_hardstart(struct sk_buff *skb, struc + requeue = 1; + goto hardstart_fail; + } +-#endif + +- /* If the skb data is shared, we will copy it so we can strip padding +- * without affecting any other bridge ports. */ +- if (skb_cloned(skb)) { +- /* Remember the original SKB so we can free up our references */ +- struct sk_buff *skb_new; +- skb_new = skb_copy(skb, GFP_ATOMIC); +- if (skb_new == NULL) { +- DPRINTF(sc, ATH_DEBUG_XMIT, +- "Dropping; skb_copy failure.\n"); +- /* No free RAM, do not requeue! */ +- goto hardstart_fail; +- } +- ieee80211_skb_copy_noderef(skb, skb_new); +- ieee80211_dev_kfree_skb(&skb); +- skb = skb_new; +- } + eh = (struct ether_header *)skb->data; + +-#ifdef ATH_SUPERG_FF + /* NB: use this lock to protect an->an_tx_ffbuf (and txq->axq_stageq) + * in athff_can_aggregate() call too. */ + ATH_TXQ_LOCK_IRQ(txq); +--- a/net80211/ieee80211_output.c ++++ b/net80211/ieee80211_output.c +@@ -283,7 +283,7 @@ ieee80211_hardstart(struct sk_buff *skb, + * normal vap. */ + if (vap->iv_xrvap && (ni == vap->iv_bss) && + vap->iv_xrvap->iv_sta_assoc) { +- struct sk_buff *skb1 = skb_copy(skb, GFP_ATOMIC); ++ struct sk_buff *skb1 = skb_clone(skb, GFP_ATOMIC); + if (skb1) { + memset(SKB_CB(skb1), 0, sizeof(struct ieee80211_cb)); + #ifdef IEEE80211_DEBUG_REFCNT +@@ -566,7 +566,7 @@ ieee80211_skbhdr_adjust(struct ieee80211 + struct ieee80211_key *key, struct sk_buff *skb, int ismulticast) + { + /* XXX pre-calculate per node? */ +- int need_headroom = LLC_SNAPFRAMELEN + hdrsize + IEEE80211_ADDR_LEN; ++ int need_headroom = LLC_SNAPFRAMELEN + hdrsize; + int need_tailroom = 0; + #ifdef ATH_SUPERG_FF + int isff = ATH_FF_MAGIC_PRESENT(skb); +@@ -608,109 +608,56 @@ ieee80211_skbhdr_adjust(struct ieee80211 + need_tailroom += cip->ic_miclen; + } + +- if (skb_shared(skb)) { +- /* Take our own reference to the node in the clone */ +- ieee80211_ref_node(SKB_CB(skb)->ni); +- /* Unshare the node, decrementing users in the old skb */ +- skb = skb_unshare(skb, GFP_ATOMIC); +- } ++ need_headroom -= skb_headroom(skb); ++ if (isff) ++ need_tailroom -= skb_tailroom(skb2); ++ else ++ need_tailroom -= skb_tailroom(skb); ++ ++ if (need_headroom < 0) ++ need_headroom = 0; ++ if (need_tailroom < 0) ++ need_tailroom = 0; + +-#ifdef ATH_SUPERG_FF +- if (isff) { +- if (skb == NULL) { +- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, +- "%s: cannot unshare for encapsulation\n", +- __func__); +- vap->iv_stats.is_tx_nobuf++; +- ieee80211_dev_kfree_skb(&skb2); ++ if (skb_cloned(skb) || (need_headroom > 0) || ++ (!isff && (need_tailroom > 0))) { + +- return NULL; ++ if (pskb_expand_head(skb, need_headroom, need_tailroom, GFP_ATOMIC)) { ++ IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, ++ "%s: cannot expand storage (tail)\n", __func__); ++ goto error; + } ++ } + +- /* first skb header */ +- if (skb_headroom(skb) < need_headroom) { +- struct sk_buff *tmp = skb; +- skb = skb_realloc_headroom(skb, need_headroom); +- if (skb == NULL) { +- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, +- "%s: cannot expand storage (head1)\n", +- __func__); +- vap->iv_stats.is_tx_nobuf++; +- ieee80211_dev_kfree_skb(&skb2); +- return NULL; +- } else +- ieee80211_skb_copy_noderef(tmp, skb); +- ieee80211_dev_kfree_skb(&tmp); +- /* NB: cb[] area was copied, but not next ptr. must do that +- * prior to return on success. */ +- } ++#ifdef ATH_SUPERG_FF ++ if (isff) { ++ inter_headroom -= skb_headroom(skb2); ++ if (inter_headroom < 0) ++ inter_headroom = 0; ++ if ((skb_cloned(skb2) || ++ (inter_headroom > 0) || (need_tailroom > 0))) { + +- /* second skb with header and tail adjustments possible */ +- if (skb_tailroom(skb2) < need_tailroom) { +- int n = 0; +- if (inter_headroom > skb_headroom(skb2)) +- n = inter_headroom - skb_headroom(skb2); +- if (pskb_expand_head(skb2, n, +- need_tailroom - skb_tailroom(skb2), GFP_ATOMIC)) { +- ieee80211_dev_kfree_skb(&skb2); ++ if (pskb_expand_head(skb2, inter_headroom, ++ need_tailroom, GFP_ATOMIC)) { + IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, +- "%s: cannot expand storage (tail2)\n", +- __func__); +- vap->iv_stats.is_tx_nobuf++; +- /* this shouldn't happen, but don't send first ff either */ +- ieee80211_dev_kfree_skb(&skb); ++ "%s: cannot expand storage (tail)\n", __func__); ++ goto error; + } +- } else if (skb_headroom(skb2) < inter_headroom) { +- struct sk_buff *tmp = skb2; +- +- skb2 = skb_realloc_headroom(skb2, inter_headroom); +- if (skb2 == NULL) { +- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, +- "%s: cannot expand storage (head2)\n", +- __func__); +- vap->iv_stats.is_tx_nobuf++; +- /* this shouldn't happen, but don't send first ff either */ +- ieee80211_dev_kfree_skb(&skb); +- skb = NULL; +- } else +- ieee80211_skb_copy_noderef(tmp, skb); +- ieee80211_dev_kfree_skb(&tmp); +- } +- if (skb) { +- skb->next = skb2; + } +- return skb; ++ skb->next = skb2; + } + #endif /* ATH_SUPERG_FF */ +- if (skb == NULL) { +- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, +- "%s: cannot unshare for encapsulation\n", __func__); +- vap->iv_stats.is_tx_nobuf++; +- } else if (skb_tailroom(skb) < need_tailroom) { +- int n = 0; +- if (need_headroom > skb_headroom(skb)) +- n = need_headroom - skb_headroom(skb); +- if (pskb_expand_head(skb, n, need_tailroom - +- skb_tailroom(skb), GFP_ATOMIC)) { +- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, +- "%s: cannot expand storage (tail)\n", __func__); +- vap->iv_stats.is_tx_nobuf++; +- ieee80211_dev_kfree_skb(&skb); +- } +- } else if (skb_headroom(skb) < need_headroom) { +- struct sk_buff *tmp = skb; +- skb = skb_realloc_headroom(skb, need_headroom); +- /* Increment reference count after copy */ +- if (skb == NULL) { +- IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, +- "%s: cannot expand storage (head)\n", __func__); +- vap->iv_stats.is_tx_nobuf++; +- } else +- ieee80211_skb_copy_noderef(tmp, skb); +- ieee80211_dev_kfree_skb(&tmp); +- } + + return skb; ++ ++error: ++ vap->iv_stats.is_tx_nobuf++; ++ ieee80211_dev_kfree_skb(&skb); ++#ifdef ATH_SUPERG_FF ++ if (skb2) ++ ieee80211_dev_kfree_skb(&skb2); ++#endif ++ return NULL; + } + + #define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none) +--- a/net80211/ieee80211_input.c ++++ b/net80211/ieee80211_input.c +@@ -204,7 +204,6 @@ ieee80211_input(struct ieee80211vap * va + struct ieee80211_frame *wh; + struct ieee80211_key *key; + struct ether_header *eh; +- struct sk_buff *skb2; + #ifdef ATH_SUPERG_FF + struct llc *llc; + #endif +@@ -244,20 +243,6 @@ ieee80211_input(struct ieee80211vap * va + vap->iv_stats.is_rx_tooshort++; + goto out; + } +- /* Clone the SKB... we assume somewhere in this driver that we 'own' +- * the skbuff passed into hard start and we do a lot of messing with it +- * but bridges under some cases will not clone for the first pass of skb +- * to a bridge port, but will then clone for subsequent ones. This is +- * odd behavior but it means that if we have trashed the skb we are given +- * then other ports get clones of the residual garbage. +- */ +- if ((skb2 = skb_copy(skb, GFP_ATOMIC)) == NULL) { +- vap->iv_devstats.tx_dropped++; +- goto out; +- } +- ieee80211_skb_copy_noderef(skb, skb2); +- ieee80211_dev_kfree_skb(&skb); +- skb = skb2; + + /* + * Bit of a cheat here, we use a pointer for a 3-address +@@ -738,7 +723,7 @@ ieee80211_input(struct ieee80211vap * va + /* ether_type must be length as FF frames are always LLC/SNAP encap'd */ + frame_len = ntohs(eh_tmp->ether_type); + +- skb1 = skb_copy(skb, GFP_ATOMIC); ++ skb1 = skb_clone(skb, GFP_ATOMIC); + if (skb1 == NULL) + goto err; + ieee80211_skb_copy_noderef(skb, skb1); +@@ -1137,7 +1122,7 @@ ieee80211_deliver_data(struct ieee80211_ + + if (ETHER_IS_MULTICAST(eh->ether_dhost) && !netif_queue_stopped(dev)) { + /* Create a SKB for the BSS to send out. */ +- skb1 = skb_copy(skb, GFP_ATOMIC); ++ skb1 = skb_clone(skb, GFP_ATOMIC); + if (skb1) + SKB_CB(skb1)->ni = ieee80211_ref_node(vap->iv_bss); + } |