Hi Pawel, This is the error. Thanking You, Param.

Thanks Pawel. I am using an old version of DPDK and SPDK. I will try increasing the CONFIG_RTR_MAX_MEMSEG. Should we add it to the config file? Thanking You, Param.

One other thing to try is to simply reboot the machine, then reserve the 32GB right away. DPDK's memory manager works by gathering the hugepages into physically continuous memory "segments", but it has a limited number of total segments that it will create (256 by default). I don't know why the number of segments is limited - probably because the list of segments is just held in an array. Either way, if you reboot and then immediately reserve the pages (or change your boot options to reserve the pages automatically), you're much more likely to get nice physically contiguous chunks so you don't hit the max segments issue. From: SPDK [mailto:[email protected]] On Behalf Of Wodkowski, PawelX Sent: Wednesday, August 2, 2017 5:44 AM To: Storage Performance Development Kit <spdk(a)lists.01.org&gt; Subject: Re: [SPDK] Failed to remap 2 MB pages Just grep DPDK files for CONFIG_RTR_MAX_MEMSEG. You will find several places. Change all of them. From: SPDK [mailto:[email protected]] On Behalf Of Kumaraparameshwaran Rathnavel Sent: Wednesday, August 2, 2017 2:35 PM To: Storage Performance Development Kit <[email protected]<mailto:[email protected]>> Subject: Re: [SPDK] Failed to remap 2 MB pages Thanks Pawel. I am using an old version of DPDK and SPDK. I will try increasing the CONFIG_RTR_MAX_MEMSEG. Should we add it to the config file? Thanking You, Param. On 02-Aug-2017, at 4:32 PM, Wodkowski, PawelX <[email protected]<mailto:[email protected]>> wrote: Yeah, the same message. CONFIG_RTE_MAX_MEMSEG is not big enough for 16GB. Try rebuilding DPDK and SPDK with CONFIG_RTE_MAX_MEMSEG=512 or 1024. (Just grep for CONFIG_RTE_MAX_MEMSEG). BTW: which version of SPDK are you using? In current master or 17.07 error message from SPDK should be something like this: Starting DPDK 17.05.0 initialization... [ DPDK EAL parameters: vhost -c 2 -m 16384 --master-lcore=1 --file-prefix=spdk_pid33057 ] EAL: Detected 48 lcore(s) EAL: No free hugepages reported in hugepages-1048576kB EAL: Probing VFIO support... EAL: VFIO support initialized EAL: Can only reserve 6375 pages from 9942 requested Current CONFIG_RTE_MAX_MEMSEG=256 is not enough Please either increase it or request less amount of memory. EAL: FATAL: Cannot init memory EAL: Cannot init memory Failed to initialize DPDK Pawel From: SPDK [mailto:[email protected]] On Behalf Of Kumaraparameshwaran Rathnavel Sent: Wednesday, August 2, 2017 11:53 AM To: Storage Performance Development Kit <[email protected]<mailto:[email protected]>> Subject: Re: [SPDK] Failed to remap 2 MB pages Hi Pawel, This is the error. Thanking You, Param. Starting Intel(R) DPDK initialization ... [ DPDK EAL parameters: cs_dp -c 3 -n 4 -m 16384 --master-lcore=0 --file-prefix=rte0 --proc-type=auto ] EAL: Detected 40 lcore(s) EAL: Auto-detected process type: PRIMARY EAL: No free hugepages reported in hugepages-1048576kB EAL: Probing VFIO support... EAL: Failed to remap 2 MB pages PANIC in rte_eal_init(): Cannot init memory On 02-Aug-2017, at 1:47 PM, Wodkowski, PawelX <[email protected]<mailto:[email protected]>> wrote: Can you send full log when failure occur. Pawel -----Original Message----- From: SPDK [mailto:[email protected]] On Behalf Of Kumaraparameshwaran Rathnavel Sent: Tuesday, August 1, 2017 3:02 PM To: Storage Performance Development Kit <[email protected]<mailto:[email protected]>> Subject: [SPDK] Failed to remap 2 MB pages Hi All, I have a system with 256GB. Initially I was giving 16GB for the SPDK to work. Now I want to increase it to 32GB. I have given 16384 2MB hugepages. But I am getting the error Failed to remap 2 MB pages. Before the map_all_hugepages there is a call find_physaddrs and that passes. So can I assume that physical memory is available and failure is due to some other reason. Has anyone else observed it and aware of why this is happening. Thanking You, Param. _______________________________________________ SPDK mailing list [email protected]<mailto:[email protected]> https://lists.01.org/mailman/listinfo/spdk _______________________________________________ SPDK mailing list [email protected]<mailto:[email protected]> https://lists.01.org/mailman/listinfo/spdk _______________________________________________ SPDK mailing list [email protected]<mailto:[email protected]> https://lists.01.org/mailman/listinfo/spdk