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akpm@linux-foundation.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, kprateek.nayak@amd.com, baolin.wang@linux.alibaba.com, nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev, kas@kernel.org, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, ying.huang@linux.alibaba.com, apopple@nvidia.com, jannh@google.com, pfalcato@suse.de, hannes@cmpxchg.org, shy828301@gmail.com, raghavendra.kt@amd.com, stable@vger.kernel.org Subject: Re: [PATCH v3 2/7] mm: allow shared folios to be promoted to a fast tier Date: Thu, 24 Sep 2026 11:42:40 -0400 X-Mailer: MailMate (3.0r7032) Message-ID: <54D318EB-647E-4E52-9223-507B2913A6E5@nvidia.com> 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RmlAF18JCtXDEgAkrZkblJ2Pa9QLZgArKPcnWRgBXhyqgUHynEDHhxU9w2G3ZWRBNXcZ9GbfyHS9vdbEoFNdhsAKwOCAJNBPP3xsv65Cwm6gg0qAGXvvSLupWyW8/FEvED7+z4faMhEvlvix+kT4kvcKfkys2PY2R3KbrxWnWf6q1feZNEGV/Pi77fsDE1GnhdRbLbWMEWfoRJKwOpf7OjpTZXJgctNtcspnxafYxMeZRw65tM/5405uClO0JgerNAL8FcBUGpCyY0LCgw0W0MC6BDZLdBjHaKFe0UPlA5/8KxfaWhjp0MKLY0hZxy5sykC4EDaWva4AyyS/GdFBR18VKg7F39UDeuU7cTdsNtJotx/sAxEjtsRdy/wlFLdo8zeV30cEUy2tPJoFrSId3vq4inSz3BbLmzVNO09p3WuwioLnYups9LEYMtpeU/+kdrkHr Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 24 Sep 2026, at 11:37, Gregory Price wrote: > On Thu, Sep 24, 2026 at 05:32:22PM +0200, David Hildenbrand (Arm) wrote: >> On 9/24/26 16:07, Gregory Price wrote: >>> On Thu, Sep 24, 2026 at 01:59:15PM +0200, David Hildenbrand (Arm) wrote: >>>> I wonder if a better name would just make the comment above (about memory >>>> tiering) implicit and make more sense of the sysctl_numa_balancing_mode & >>>> NUMA_BALANCING_MEMORY_TIERING) check. >>>> >>>> folio_promotable() >>>> >>>> folio_is_promotable() >>>> >>>> folio_numa_promotable() >>>> >>>> etc. >>>> >>>> because that seems to be what we really test with both things combined. >>>> >>> >>> maybe: folio_numab_promotable() ? >> >> Works for me if "numab" means numa balancing :) >> > > Sounds good, i'll let this rest for a bit before spinning a v4. I think > the rest is pretty solid, but there's one other sashiko thing i need to > think about whether it's real or not. folio_numab_promotable() sounds good to me. Best Regards, Yan, Zi