Messages in this thread | | | Date | Wed, 29 Nov 2017 12:23:22 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH RFC 2/2] mm, hugetlb: do not rely on overcommit limit during migration |
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On Wed 29-11-17 10:22:34, Michal Hocko wrote: > What about this on top. I haven't tested this yet though.
OK, it seem to work: root@test1:~# echo 1 > /proc/sys/vm/nr_hugepages root@test1:~# echo 1 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_overcommit_hugepages
root@test1:~# grep . /sys/devices/system/node/node*/hugepages/hugepages-2048kB/* /sys/devices/system/node/node0/hugepages/hugepages-2048kB/free_hugepages:0 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages:0 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/surplus_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/free_hugepages:1 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages:1 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/surplus_hugepages:0
# mmap 2 huge pages
root@test1:~# grep . /sys/devices/system/node/node*/hugepages/hugepages-2048kB/* /sys/devices/system/node/node0/hugepages/hugepages-2048kB/free_hugepages:0 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages:0 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/surplus_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/free_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages:2 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/surplus_hugepages:1
root@test1:~# migratepages $(pidof map_hugetlb) 1 0
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/free_hugepages:0 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages:2 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/surplus_hugepages:1 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/free_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/surplus_hugepages:0
and exit the mmap
root@test1:~# grep . /sys/devices/system/node/node*/hugepages/hugepages-2048kB/* /sys/devices/system/node/node0/hugepages/hugepages-2048kB/free_hugepages:1 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages:1 /sys/devices/system/node/node0/hugepages/hugepages-2048kB/surplus_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/free_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages:0 /sys/devices/system/node/node1/hugepages/hugepages-2048kB/surplus_hugepages:0 -- Michal Hocko SUSE Labs
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