From: Matthew Wilcox <willy@infradead.org>
To: Bharata B Rao <bharata@amd.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Jonathan.Cameron@huawei.com, dave.hansen@intel.com,
gourry@gourry.net, hannes@cmpxchg.org,
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@redhat.com, byungchul@sk.com,
kinseyho@google.com, joshua.hahnjy@gmail.com, yuanchu@google.com,
balbirs@nvidia.com, alok.rathore@samsung.com
Subject: Re: [RFC PATCH v2 0/8] mm: Hot page tracking and promotion infrastructure
Date: Wed, 10 Sep 2025 16:39:16 +0100 [thread overview]
Message-ID: <aMGbpDJhOx7wHqpo@casper.infradead.org> (raw)
In-Reply-To: <20250910144653.212066-1-bharata@amd.com>
On Wed, Sep 10, 2025 at 08:16:45PM +0530, Bharata B Rao wrote:
> This patchset introduces a new subsystem for hot page tracking
> and promotion (pghot) that consolidates memory access information
> from various sources and enables centralized promotion of hot
> pages across memory tiers.
Just to be clear, I continue to believe this is a terrible idea and we
should not do this. If systems will be built with CXL (and given the
horrendous performance, I cannot see why they would be), the kernel
should not be migrating memory around like this.
next prev parent reply other threads:[~2025-09-10 15:39 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-10 14:46 Bharata B Rao
2025-09-10 14:46 ` [RFC PATCH v2 1/8] mm: migrate: Allow misplaced migration without VMA too Bharata B Rao
2025-09-10 14:46 ` [RFC PATCH v2 2/8] migrate: implement migrate_misplaced_folios_batch Bharata B Rao
2025-10-03 10:36 ` Jonathan Cameron
2025-10-03 11:02 ` Bharata B Rao
2025-09-10 14:46 ` [RFC PATCH v2 3/8] mm: Hot page tracking and promotion Bharata B Rao
2025-10-03 11:17 ` Jonathan Cameron
2025-10-06 4:13 ` Bharata B Rao
2025-09-10 14:46 ` [RFC PATCH v2 4/8] x86: ibs: In-kernel IBS driver for memory access profiling Bharata B Rao
2025-10-03 12:19 ` Jonathan Cameron
2025-10-06 4:28 ` Bharata B Rao
2025-09-10 14:46 ` [RFC PATCH v2 5/8] x86: ibs: Enable IBS profiling for memory accesses Bharata B Rao
2025-10-03 12:22 ` Jonathan Cameron
2025-09-10 14:46 ` [RFC PATCH v2 6/8] mm: mglru: generalize page table walk Bharata B Rao
2025-09-10 14:46 ` [RFC PATCH v2 7/8] mm: klruscand: use mglru scanning for page promotion Bharata B Rao
2025-10-03 12:30 ` Jonathan Cameron
2025-09-10 14:46 ` [RFC PATCH v2 8/8] mm: sched: Move hot page promotion from NUMAB=2 to kpromoted Bharata B Rao
2025-10-03 12:38 ` Jonathan Cameron
2025-10-06 5:57 ` Bharata B Rao
2025-10-06 9:53 ` Jonathan Cameron
2025-09-10 15:39 ` Matthew Wilcox [this message]
2025-09-10 16:01 ` [RFC PATCH v2 0/8] mm: Hot page tracking and promotion infrastructure Gregory Price
2025-09-16 19:45 ` David Rientjes
2025-09-16 22:02 ` Gregory Price
2025-09-17 0:30 ` Wei Xu
2025-09-17 3:20 ` Balbir Singh
2025-09-17 4:15 ` Bharata B Rao
2025-09-17 16:49 ` Jonathan Cameron
2025-09-25 14:03 ` Yiannis Nikolakopoulos
2025-09-25 14:41 ` Gregory Price
2025-10-16 11:48 ` Yiannis Nikolakopoulos
2025-09-25 15:00 ` Jonathan Cameron
2025-09-25 15:08 ` Gregory Price
2025-09-25 15:18 ` Gregory Price
2025-09-25 15:24 ` Jonathan Cameron
2025-09-25 16:06 ` Gregory Price
2025-09-25 17:23 ` Jonathan Cameron
2025-09-25 19:02 ` Gregory Price
2025-10-01 7:22 ` Gregory Price
2025-10-17 9:53 ` Yiannis Nikolakopoulos
2025-10-17 14:15 ` Gregory Price
2025-10-17 14:36 ` Jonathan Cameron
2025-10-17 14:59 ` Gregory Price
2025-10-20 14:05 ` Jonathan Cameron
2025-10-21 18:52 ` Gregory Price
2025-10-21 18:57 ` Gregory Price
2025-10-22 9:09 ` Jonathan Cameron
2025-10-22 15:05 ` Gregory Price
2025-10-23 15:29 ` Jonathan Cameron
2025-10-16 16:16 ` Yiannis Nikolakopoulos
2025-10-20 14:23 ` Jonathan Cameron
2025-10-20 15:05 ` Gregory Price
2025-10-08 17:59 ` Vinicius Petrucci
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