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madwifi: nuke some totally wrong code which was causing performance issues

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SVN-Revision: 10270
This commit is contained in:
Felix Fietkau 2008-01-26 05:45:37 +00:00
parent 0751ec93ff
commit c9d3be59ae
1 changed files with 118 additions and 0 deletions
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118
package/madwifi/patches/319-no_queue_stop.patch Normal file
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@ -0,0 +1,118 @@
Index: madwifi-dfs-r3252/ath/if_ath.c
===================================================================
--- madwifi-dfs-r3252.orig/ath/if_ath.c 2008-01-26 06:36:36.889082972 +0100
+++ madwifi-dfs-r3252/ath/if_ath.c 2008-01-26 06:41:35.670109540 +0100
@@ -3082,46 +3082,44 @@
{
struct ath_buf* bf = NULL;
ATH_TXBUF_LOCK_ASSERT(sc);
+
/* Reserve at least ATH_TXBUF_MGT_RESERVED buffers for management frames */
- if (ath_get_buffers_available() <= ATH_TXBUF_MGT_RESERVED) {
+ if (!for_management && (ath_get_buffers_available() <= ATH_TXBUF_MGT_RESERVED)) {
/* Stop the queue, we are full */
DPRINTF(sc, ATH_DEBUG_XMIT, "%s: stopping queuing of additional "
"frames. Insufficient free "
"buffers.\n", __func__);
sc->sc_stats.ast_tx_qstop++;
- netif_stop_queue(sc->sc_dev);
- sc->sc_devstopped = 1;
ATH_SCHEDULE_TQUEUE(&sc->sc_txtq, NULL);
+ return NULL;
}
/* Only let us go further if management frame, or there are enough */
- if (for_management || (ath_get_buffers_available() > ATH_TXBUF_MGT_RESERVED)) {
- bf = STAILQ_FIRST(&sc->sc_txbuf);
- if (bf) {
- STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list);
- /* This should be redundant, unless someone illegally
- * accessed the buffer after returning it. */
+ bf = STAILQ_FIRST(&sc->sc_txbuf);
+ if (bf) {
+ STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list);
+ /* This should be redundant, unless someone illegally
+ * accessed the buffer after returning it. */
#ifdef IEEE80211_DEBUG_REFCNT
- cleanup_ath_buf_debug(sc, bf, BUS_DMA_TODEVICE, func, line);
+ cleanup_ath_buf_debug(sc, bf, BUS_DMA_TODEVICE, func, line);
#else
- cleanup_ath_buf(sc, bf, BUS_DMA_TODEVICE);
+ cleanup_ath_buf(sc, bf, BUS_DMA_TODEVICE);
#endif
- atomic_inc(&ath_buf_counter);
+ atomic_inc(&ath_buf_counter);
#ifdef IEEE80211_DEBUG_REFCNT
- DPRINTF(sc, ATH_DEBUG_TXBUF,
- "[TXBUF=%03d/%03d] %s:%d -> %s:%d took txbuf %p.\n",
- ath_get_buffer_count(), ATH_TXBUF,
- func, line, __func__, __LINE__,
- bf);
+ DPRINTF(sc, ATH_DEBUG_TXBUF,
+ "[TXBUF=%03d/%03d] %s:%d -> %s:%d took txbuf %p.\n",
+ ath_get_buffer_count(), ATH_TXBUF,
+ func, line, __func__, __LINE__,
+ bf);
#endif
- }
- else {
- DPRINTF(sc, ATH_DEBUG_ANY,
- "%s: discard %s, no xmit buffers available.\n",
- __func__,
- for_management ? "management frame" : "frame");
- sc->sc_stats.ast_tx_nobuf++;
- }
+ }
+ else {
+ DPRINTF(sc, ATH_DEBUG_ANY,
+ "%s: discard %s, no xmit buffers available.\n",
+ __func__,
+ for_management ? "management frame" : "frame");
+ sc->sc_stats.ast_tx_nobuf++;
}
return bf;
@@ -3503,9 +3501,6 @@
/* Pass control of the skb to the caller (i.e., resources are their
* problem). */
if (requeue) {
- /* queue is full, let the kernel backlog the skb */
- netif_stop_queue(dev);
- sc->sc_devstopped = 1;
/* Stop tracking again we are giving it back*/
ieee80211_skb_untrack(skb);
return NETDEV_TX_BUSY;
@@ -12871,21 +12866,6 @@
ath_get_buffer_count(), ATH_TXBUF,
func, line, __func__, __LINE__, bfaddr);
#endif /* #ifdef IEEE80211_DEBUG_REFCNT */
- if (sc->sc_devstopped) {
- ++sc->sc_reapcount;
- if (sc->sc_reapcount > ATH_TXBUF_FREE_THRESHOLD) {
- if (!ath_radio_silence_required_for_dfs(sc)) {
- netif_start_queue(sc->sc_dev);
- DPRINTF(sc, ATH_DEBUG_ANY,
- "%s: restarting queue.\n",
- __func__);
- }
- sc->sc_reapcount = 0;
- sc->sc_devstopped = 0;
- }
- else if (!ath_radio_silence_required_for_dfs(sc))
- ATH_SCHEDULE_TQUEUE(&sc->sc_txtq, NULL);
- }
*bf = NULL;
}
Index: madwifi-dfs-r3252/ath/if_athvar.h
===================================================================
--- madwifi-dfs-r3252.orig/ath/if_athvar.h 2008-01-26 06:41:42.206482027 +0100
+++ madwifi-dfs-r3252/ath/if_athvar.h 2008-01-26 06:41:46.646735062 +0100
@@ -667,7 +667,6 @@
unsigned int sc_xrgrppoll:1; /* xr group polls are active */
unsigned int sc_syncbeacon:1; /* sync/resync beacon timers */
unsigned int sc_hasclrkey:1; /* CLR key supported */
- unsigned int sc_devstopped:1; /* stopped due to of no tx bufs */
unsigned int sc_stagbeacons:1; /* use staggered beacons */
unsigned int sc_dfswait:1; /* waiting on channel for radar detect */
unsigned int sc_ackrate:1; /* send acks at high bitrate */