From: Donet Tom <donettom@linux.ibm.com>
To: Matthew Wilcox <willy@infradead.org>, Gregory Price <gourry@gourry.net>
Cc: linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel-team@meta.com,
akpm@linux-foundation.org, mingo@redhat.com,
peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org, hannes@cmpxchg.org,
mhocko@kernel.org, roman.gushchin@linux.dev,
shakeel.butt@linux.dev, Huang Ying <ying.huang@linux.alibaba.com>,
Keith Busch <kbusch@meta.com>, Feng Tang <feng.tang@intel.com>,
Neha Gholkar <nehagholkar@meta.com>
Subject: Re: [RFC PATCH v4 0/6] Promotion of Unmapped Page Cache Folios.
Date: Sun, 13 Apr 2025 10:53:48 +0530 [thread overview]
Message-ID: <f4131737-fe1b-46a9-acde-73d1e29cda98@linux.ibm.com> (raw)
In-Reply-To: <Z_mqfpfs--Ak8giA@casper.infradead.org>
On 4/12/25 5:19 AM, Matthew Wilcox wrote:
> On Fri, Apr 11, 2025 at 06:11:05PM -0400, Gregory Price wrote:
>> Unmapped page cache pages can be demoted to low-tier memory, but
> No. Page cache should never be demoted to low-tier memory.
> NACK this patchset.
Hi Mathew,
I have one doubt. Under memory pressure, page cache allocations can
fall back to lower-tier memory, right? So later, if those page cache pages
become hot, shouldn't we promote them?
Thanks
Donet
next prev parent reply other threads:[~2025-04-13 5:24 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-11 22:11 Gregory Price
2025-04-11 22:11 ` [RFC PATCH v4 1/6] migrate: Allow migrate_misplaced_folio_prepare() to accept a NULL VMA Gregory Price
2025-04-15 0:12 ` SeongJae Park
2025-04-11 22:11 ` [RFC PATCH v4 2/6] memory: allow non-fault migration in numa_migrate_check path Gregory Price
2025-04-11 22:11 ` [RFC PATCH v4 3/6] vmstat: add page-cache numa hints Gregory Price
2025-04-11 22:11 ` [RFC PATCH v4 4/6] migrate: implement migrate_misplaced_folio_batch Gregory Price
2025-04-15 0:19 ` SeongJae Park
2025-04-11 22:11 ` [RFC PATCH v4 5/6] migrate,sysfs: add pagecache promotion Gregory Price
2025-04-15 0:41 ` SeongJae Park
2025-04-11 22:11 ` [RFC PATCH v4 6/6] mm/swap.c: Enable promotion of unmapped MGLRU page cache pages Gregory Price
2025-04-11 23:49 ` [RFC PATCH v4 0/6] Promotion of Unmapped Page Cache Folios Matthew Wilcox
2025-04-12 0:09 ` Gregory Price
2025-04-12 0:35 ` Matthew Wilcox
2025-04-12 0:44 ` Gregory Price
2025-04-12 11:52 ` Ritesh Harjani
2025-04-12 14:35 ` Gregory Price
2025-04-13 5:23 ` Donet Tom [this message]
2025-04-13 12:48 ` Matthew Wilcox
2025-04-15 0:45 ` SeongJae Park
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