From: Gregory Price <gourry@gourry.net>
To: Matthew Wilcox <willy@infradead.org>
Cc: Bharata B Rao <bharata@amd.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Jonathan.Cameron@huawei.com, dave.hansen@intel.com,
mgorman@techsingularity.net, mingo@redhat.com,
peterz@infradead.org, raghavendra.kt@amd.com, riel@surriel.com,
rientjes@google.com, sj@kernel.org, weixugc@google.com,
ying.huang@linux.alibaba.com, ziy@nvidia.com, dave@stgolabs.net,
nifan.cxl@gmail.com, xuezhengchu@huawei.com, yiannis@zptcorp.com,
akpm@linux-foundation.org, david@kernel.org, byungchul@sk.com,
kinseyho@google.com, joshua.hahnjy@gmail.com, yuanchu@google.com,
balbirs@nvidia.com, alok.rathore@samsung.com, shivankg@amd.com,
donettom@linux.ibm.com
Subject: Re: [PATCH v7 0/7] mm: Hot page tracking and promotion infrastructure
Date: Wed, 6 May 2026 16:22:34 +0100 [thread overview]
Message-ID: <aftcuvXzHSywFL8g@gourry-fedora-PF4VCD3F> (raw)
In-Reply-To: <afkDNR9yVRjire4T@casper.infradead.org>
On Mon, May 04, 2026 at 09:36:05PM +0100, Matthew Wilcox wrote:
> On Mon, May 04, 2026 at 11:39:17AM +0530, Bharata B Rao wrote:
> > This is v7 of pghot, a hot-page tracking and promotion subsystem. The
>
> I continue to think we should not do this.
My only pushback on the general "we should not do this" is that we need
something to counter-balance the demotion bit in vmscan.c, and the
current implementation (prot_none faults) is rather :[
I think this series needs to greatly limit its complexity and provide
some gentle correction for LRU inversions, and I think they're making a
decent attempt at that.
But then I think local memory expansion on CXL is going pretty
swimmingly in our datacenters :], others may not feel the same.
~Gregory
next prev parent reply other threads:[~2026-05-06 15:22 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-04 6:09 [PATCH v7 0/7] mm: Hot page tracking and promotion infrastructure Bharata B Rao
2026-05-04 6:09 ` [PATCH v7 1/7] mm: migrate: Allow misplaced migration without VMA Bharata B Rao
2026-05-04 6:09 ` [PATCH v7 2/7] mm: migrate: Add promote_misplaced_memcg_folios() Bharata B Rao
2026-05-04 18:14 ` Donet Tom
2026-05-06 6:15 ` Bharata B Rao
2026-05-04 6:09 ` [PATCH v7 3/7] mm: Hot page tracking and promotion - pghot Bharata B Rao
2026-05-04 6:09 ` [PATCH v7 4/7] mm: pghot: Precision mode for pghot Bharata B Rao
2026-05-04 18:41 ` Donet Tom
2026-05-06 6:17 ` Bharata B Rao
2026-05-04 6:09 ` [PATCH v7 5/7] mm: sched: move NUMA balancing tiering promotion to pghot Bharata B Rao
2026-05-05 4:44 ` Donet Tom
2026-05-06 6:20 ` Bharata B Rao
2026-05-04 6:09 ` [RFC PATCH v7 6/7] x86/ibs: Move IBS caps definitions into its own header Bharata B Rao
2026-05-04 6:09 ` [RFC PATCH v7 7/7] x86/mm/ibs: In-kernel driver for AMD IBS Memory Profiler Bharata B Rao
2026-05-04 6:23 ` [PATCH v7 0/7] mm: Hot page tracking and promotion infrastructure Bharata B Rao
2026-05-04 20:36 ` Matthew Wilcox
2026-05-05 22:17 ` Balbir Singh
2026-05-06 3:43 ` Bharata B Rao
2026-05-06 4:02 ` Balbir Singh
2026-05-06 5:00 ` Bharata B Rao
2026-05-06 15:22 ` Gregory Price [this message]
2026-05-05 10:41 ` Bharata B Rao
2026-05-05 13:42 ` Bharata B Rao
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