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Message-Id: <20080615211030.M80450@visp.net.lb> Date: Mon, 16 Jun 2008 00:26:48 +0300 From: "Denys Fedoryshchenko" <denys@...p.net.lb> To: netdev@...r.kernel.org Cc: romieu@...zoreil.com Subject: r8169 rx descriptors >From NetBSD sources http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/dev/ic/rtl8169.c?rev=1.14.2.7&content-type=text/plain&logsort=rev&f=h&only_with_tag=netbsd-3 * o RX and TX DMA rings can have up to 1024 descriptors * (the 8139C+ allows a maximum of 64) Why in Linux source: #define NUM_TX_DESC 64 /* Number of Tx descriptor registers */ #define NUM_RX_DESC 256 /* Number of Rx descriptor registers */ Is it possible to do them changeable over ethtool -g ? Maybe NetBSD developers signed NDA and have access to datasheets? Also i seen in one patch from Realtek , something similar to -#define RX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */ +#define RX_DMA_BURST 7 /* Maximum PCI burst, '6' is 1024 */ Why it is reverted or not applied? In sources from Realtek website it is #define RX_DMA_BURST 7 /* Maximum PCI burst, '7' is unlimited */ #define TX_DMA_BURST 7 /* Maximum PCI burst, '7' is unlimited */ I will try to change burst settings on my router, and waiting comments about -- Denys Fedoryshchenko Technical Manager Virtual ISP S.A.L. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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