Hi, In doing some performance experiments I found that using a 10G Mellanox MX354A Dual port FDR CX3 device on a server running Apache and running ab against that server causes the system to crash with 'iommu=soft swiotlb=force'. The same behavior is seen without these options on Dom0 running under Xen.
I have tried this on v4.0 and v4.3-rc3. Examples of crashes: http://pastebin.ubuntu.com/11953498/ http://pastebin.ubuntu.com/11953443/ Kernel config (v4.3): http://paste.ubuntu.com/12605446/ To reproduce, host a file in apache server on a system with the Mellanox NIC (I used the 41K index file of the GCC manual) and run ab (apache bench) from a client machine, something like this: $ ab -n 100000 -c 100 http://10.10.1.2/gcc/index.html I'm afraid debugging this is out of my area of expertise. Is this something you could have a look at? Thanks, -Christoffer -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
