Re: [PATCH] hugetlbfs: add hugepages_node kernel parameter

[Andrew Morton]

On Fri, 20 Aug 2021 11:05:36 +0800 yaozhenguo <yaozhenguo1@xxxxxxxxx> wrote:

> We can specify the number of hugepages to allocate at boot. But the
> hugepages is balanced in all nodes at present. In some scenarios,
> we only need hugepags in one node. For example: DPDK needs hugepages
> which is in the same node as NIC. if DPDK needs four hugepags of 1G
> size in node1 and system has 16 numa nodes. We must reserve 64 hugepags
> in kernel cmdline. But, only four hugepages is used. The others should
> be free after boot.If the system memory is low(for example: 64G), it will
> be an impossible task. So, add hugepages_node kernel parameter to specify
> node number of hugepages to allocate at boot.
> For example add following parameter:
> 
> hugepagesz=1G hugepages_node=1 hugepages=4
> 
> It will allocate 4 hugepags in node1 at boot.

If were going to do this, shouldn't we permit more than one node?

	hugepages_nodes=1,2,5