[dpdk-dev] Segmentation fault in rte_eal_hugepage_attach

[Rick LaMont <lamont@dotcsw.com>]

My DPDK application works fine when it's the primary process but crashes
whenever --proc-type=secondary. The segmentation fault occurs in this call
to mmap() within rte_eal_hugepage_attach():

        /*
         * fdzero is mmapped to get a contiguous block of virtual
         * addresses of the appropriate memseg size.
         * use mmap to get identical addresses as the primary process.
         */
        base_addr = mmap(mcfg->memseg[s].addr, mcfg->memseg[s].len,
                 PROT_READ, MAP_PRIVATE | MAP_FIXED, fd_zero, 0);

I've confirmed that addr and len match the values in rte_eal_hugepage_init()
of the primary process (1 gigabyte). The target platform is a 32-bit embedded
system running a Yocto distribution. I've confirmed that other applications
such as mp_simple work as both primary and secondary on the same platform.
The problem only occurs with a larger application to which I'm adding DPDK
capabilities.

Any advice on how to troubleshoot this? I've been looking at it for a week
already and am running out of ideas for things to test.

Thanks,


Rick LaMont          | The storm that I thought would blow over
Dot C Software, Inc. | Clouds the light of the love that I found