From f082d62028aefee8e88dc227551c700b85ee7ad6 Mon Sep 17 00:00:00 2001 From: nbd Date: Wed, 6 Jan 2010 06:05:15 +0000 Subject: [PATCH] ixp4xx: allocate all skbs using GFP_DMA this ensures that dma bounce buffers will not be used frequently when bridging or routing frames between ethernet and wifi. significantly improves ath9k performance and obsoletes an ath specific patch git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19051 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../mac80211/patches/500-ath_use_gfp_dma.patch | 17 ----------------- .../patches-2.6.30/600-dma_performance.patch | 13 +++++++++++++ 2 files changed, 13 insertions(+), 17 deletions(-) delete mode 100644 package/mac80211/patches/500-ath_use_gfp_dma.patch create mode 100644 target/linux/ixp4xx/patches-2.6.30/600-dma_performance.patch diff --git a/package/mac80211/patches/500-ath_use_gfp_dma.patch b/package/mac80211/patches/500-ath_use_gfp_dma.patch deleted file mode 100644 index 9390a2faa..000000000 --- a/package/mac80211/patches/500-ath_use_gfp_dma.patch +++ /dev/null @@ -1,17 +0,0 @@ ---- a/drivers/net/wireless/ath/main.c -+++ b/drivers/net/wireless/ath/main.c -@@ -31,6 +31,14 @@ struct sk_buff *ath_rxbuf_alloc(struct a - u32 off; - - /* -+ * Enable GFP_DMA in order to avoid using DMA bounce buffers -+ * on IXP4xx devices with more than 64M RAM -+ */ -+#ifdef CONFIG_ARCH_IXP4XX -+ gfp_mask |= GFP_DMA; -+#endif -+ -+ /* - * Cache-line-align. This is important (for the - * 5210 at least) as not doing so causes bogus data - * in rx'd frames. diff --git a/target/linux/ixp4xx/patches-2.6.30/600-dma_performance.patch b/target/linux/ixp4xx/patches-2.6.30/600-dma_performance.patch new file mode 100644 index 000000000..5aac26ee8 --- /dev/null +++ b/target/linux/ixp4xx/patches-2.6.30/600-dma_performance.patch @@ -0,0 +1,13 @@ +--- a/net/core/skbuff.c ++++ b/net/core/skbuff.c +@@ -260,6 +260,10 @@ struct sk_buff *__alloc_skb(unsigned int + if (!skb) + goto out; + ++#ifdef CONFIG_ARCH_IXP4XX ++ gfp_mask |= GFP_DMA; ++#endif ++ + size = SKB_DATA_ALIGN(size); + data = kmalloc_node_track_caller(size + sizeof(struct skb_shared_info), + gfp_mask, node); -- 2.20.1