On Tue, 2022-06-14 at 15:25 -0700, Tim Chen wrote: > For controlling usage of a top tiered memory by a cgroup, accounting > of top tier memory usage is needed. This patch set implements the > following: > > Patch 1 introduces interface and simple implementation to retrieve > cgroup tiered memory usage > Patch 2 introduces more efficient accounting with top tier memory page counter > Patch 3 provides a sysfs interface to repot the the top tiered memory > usage. > > The patchset works with Aneesh's v6 memory-tiering implementation [1]. > It is a preparatory patch set before introducing features to > control top tiered memory in cgroups. > > I'll like to first get feedback to see if > (1) Controllng the topmost tiered memory is enough > or > (2) Multiple tiers at the top levels need to be grouped into "toptier" > or If we combine top-N tiers, I think the better name could be "fast-tier", in contrast to "slow-tier". > (3) There are use cases not covered by (1) and (2). Is it necessary to control memory usage of each tier (except the lowest/slowest)? I am not the right person to answer the question, but I want to ask it. Best Regards, Huang, Ying > Thanks. > > Tim > > [1] https://lore.kernel.org/linux-mm/20220610135229.182859-1-aneesh.kumar@xxxxxxxxxxxxx/ > > Tim Chen (3): > mm/memory-tiers Add functions for tier memory usage in a cgroup > mm/memory-tiers: Use page counter to track toptier memory usage > mm/memory-tiers: Show toptier memory usage for cgroup > > include/linux/memcontrol.h | 1 + > include/linux/memory-tiers.h | 2 + > mm/memcontrol.c | 86 +++++++++++++++++++++++++++++++++++- > mm/memory-tiers.c | 3 +- > 4 files changed, 89 insertions(+), 3 deletions(-) >
