On 2/11/26 11:29 PM, Michal Hocko wrote:
On Wed 11-02-26 20:51:09, JP Kobryn wrote:
It would be useful to narrow down reclaim to specific nodes.
Provide per-node reclaim visibility by changing the pgscan and pgsteal
stats from global vm_event_item's to node_stat_item's. Note this change has
the side effect of now tracking these stats on a per-memcg basis.
The changelog could have been more clear about the actual changes as
this is not overly clear for untrained eyes. The most important parts
are that /proc/vmstat will preserve reclaim stats with slightly
different counters ordering (shouldn't break userspace much^W), per-node
stats will be now newly displayed in /proc/zoneinfo - this is presumably
the primary motivation to have a better insight of per-node reclaim
activity, and memcg stats will now show their share of the global memory
reclaim.
Have I missed anything?
That's accurate. Plus aside from reading /proc/zoneinfo they will also
be in /sys/devices/system/node/nodeN/vmstat. I see I could have been
more explicit about this. Let me make additions to the changelog in v2.
Thanks for taking a look.
