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Date: Tue, 12 May 2009 13:32:19 +0100 From: Ben Hutchings <bhutchings@...arflare.com> To: dhlii@...sys.net Cc: netdev@...r.kernel.org Subject: Re: Puzzling driver problem On Tue, 2009-05-12 at 00:13 -0400, David H. Lynch Jr. wrote: > I am working on a driver for the Xilinx Local Link Fifo Temac. > It is based on an earlier driver for very similar hardware that uses > a scatter gather DMA engine rather than a FIFO. > 95% of the code is common. > The FIFO code is also tested independently in a bootloader and works > fine there. > > The problem I am having is that after the driver and linux load. > HTTP requests to the busy box web server hang after just a few HTTP > packets. > > Many other protocols seem to be working just fine. I can send > thousands of pings and get responses, > I can SSH to the embedded linux running the driver. > Using a packet sniffer (wireshark) aside from the HTTP stalling, > nothing looks extrodinary. > Other packets are getting through and being replied [...] Is it possible that you are setting the maximum frame length incorrectly? HTTP is likely to use maximum-length frames for responses whereas ping, SSH (aside from file transfer) and TFTP will use smaller frames. Ben. -- Ben Hutchings, Senior Software Engineer, Solarflare Communications Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. -- 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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