红帽全球峰会11.5. Configuring HugeTLB at run time
This procedure describes how to add 20 2048 kB huge pages to node2.
To reserve pages based on your requirements, replace:
- 20 with the number of huge pages you want to reserve,
- 2048kB with the size of the huge pages,
- node2 with the node on which you want to reserve the pages.
Procedure
Display the memory statistics:
# numastat -cm | egrep 'Node|Huge' Node 0 Node 1 Node 2 Node 3 Total add AnonHugePages 0 2 0 8 10 HugePages_Total 0 0 0 0 0 HugePages_Free 0 0 0 0 0 HugePages_Surp 0 0 0 0 0Add the number of huge pages of a specified size to the node:
# echo 20 > /sys/devices/system/node/node2/hugepages/hugepages-2048kB/nr_hugepages
Verification
Ensure that the number of huge pages are added:
# numastat -cm | egrep 'Node|Huge' Node 0 Node 1 Node 2 Node 3 Total AnonHugePages 0 2 0 8 10 HugePages_Total 0 0 40 0 40 HugePages_Free 0 0 40 0 40 HugePages_Surp 0 0 0 0 0See
numastat(8)man page for more information.
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