On Tue, Sep 29, 2015 at 12:04 AM, Christoffer Dall <christoffer.d...@linaro.org> wrote: > 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.
Woops, needs looking indeed. Unfortunately many people in the team are off for the Sukkot holiday with real backing to business coming to play on Oct 6th -- not sure we can really respond on that before. Are you running over ARM? which? if not, is that x86 64bit? Or. > 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 -- 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
