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The following patch corrects a hard reset that occurs on alix and soekris net5501 hardware. Specifically, this is an issue with the via rhine NIC driver. Under periods of extreme load, the via rhine driver can cause a reset of the entire system. When this happens no output is seen on the console, the device simply reboots. This was reported in the following ticket: Consistent crash on Soekris NET5501 https://dev.openwrt.org/ticket/11882 I was able to reproduce the problem locally with numerous alix 2d13 platforms. Under heavy 64 byte frame size load from a Smartbits traffic generator, the alix hardware will hard reset in under 5 minutes. The same hardware, under the same load, on FreeBSD 9.0 does not reset. The patch below backports most of the via rhine changes from kernel 3.5. With OpenWrt trunk being on kernel 3.3.8, it seemed prudent to bring these changes in to avoid this serious issue. I've tested this heavily in my test environment and was able to keep the device stable under load for extended periods of time without any resets. Also, a nice side effect of this change is that it significantly raises the performance the platform. Without this patch the alix 2d13 can move approximately 29,000 packets per second at 64 byte frame sizes. After this patch the alix can move 52,000 packets per second at 64 byte frame sizes. I put this patch under the x86 patches as those are the only platforms with via rhine hardware that I'm aware of. If it needs to go some place else please let me know. Thanks, Adam Signed-off-by: Adam Gensler <openwrt@kristenandadam.net> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33072 3c298f89-4303-0410-b956-a3cf2f4a3e73 |
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