[dpdk-dev] Fwd: EAL: map_all_hugepages(): mmap failed: Cannot allocate memory

[John Wei]

I am setting up OVS inside a Linux container. This OVS is built using DPDK
library.
During the startup of ovs-vswitchd, it core dumped due to fail to mmap.
      in eal_memory.c
       virtaddr = mmap(vma_addr, hugepage_sz, PROT_READ | PROT_WRITE,
                MAP_SHARED, fd, 0);

This call is made inside a for loop that loops through all the pages and
mmap them.
My server has two cores, and I allocated 8192 2MB pages.
The mmap for the first 4096 pages were successful. It failed when trying to
map 4096th page.

Can someone help me understand when the mmap for the first 4096 pages were
successful and it failed on 4096th page?


John



ovs-vswitchd --dpdk -c 0x1 -n 4 -l 1 --file-prefix ct0000- --socket-mem
128,128 -- unix:$DB_SOCK --pidfile --detach --log-file=ct.log


EAL: Detected lcore 23 as core 5 on socket 1
EAL: Support maximum 128 logical core(s) by configuration.
EAL: Detected 24 lcore(s)
EAL: No free hugepages reported in hugepages-1048576kB
EAL: VFIO modules not all loaded, skip VFIO support...
EAL: Setting up physically contiguous memory...
EAL: map_all_hugepages(): mmap failed: Cannot allocate memory
EAL: Failed to mmap 2 MB hugepages
PANIC in rte_eal_init():
Cannot init memory
7: [ovs-vswitchd() [0x411f15]]
6: [/lib64/libc.so.6(__libc_start_main+0xf5) [0x7ff5f6133b15]]
5: [ovs-vswitchd() [0x4106f9]]
4: [ovs-vswitchd() [0x66917d]]
3: [ovs-vswitchd() [0x42b6f5]]
2: [ovs-vswitchd() [0x40dd8c]]
1: [ovs-vswitchd() [0x56b3ba]]
Aborted (core dumped)