Re: [PATCH v3] alloc_tag: add per-NUMA node stats

[Usama Arif]

On 11/07/2025 01:23, Casey Chen wrote:
> This patch adds per-NUMA node breakdown of memory allocation,
> enabling more precise visibility into memory usage patterns across nodes.
> It is particularly valuable in cloud environments,
> where tracking asymmetric memory usage and identifying NUMA imbalances
> down to the allocation caller helps optimize memory efficiency, avoid
> CPU stranding, and improve system responsiveness under memory pressure.
>

Hi Casey,

I was just curious how you used the output from per NUMA allocation profiling
to fix the issues above? (So that we can do that as well :)). We get a lot of
NUMA high level meminfo from /sys/devices/system/node/nodeX/vmstat.
Are there specific allocations that are more of an issue?
Do you monitor these in userspace and use maybe something like numactl/migratepages
to migrate resources to another node?

Thanks!
Usama