From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
To: David Hildenbrand <david@redhat.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>,
Hugh Dickins <hughd@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Matthew Wilcox <willy@infradead.org>,
ziy@nvidia.com, Liam.Howlett@oracle.com, npache@redhat.com,
ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org,
vbabka@suse.cz, rppt@kernel.org, surenb@google.com,
mhocko@suse.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] mm: fault in complete folios instead of individual pages for tmpfs
Date: Thu, 17 Jul 2025 10:20:58 +0100 [thread overview]
Message-ID: <048c8d4d-5e5b-472f-850b-6392b8f4d2a5@lucifer.local> (raw)
In-Reply-To: <2513a63d-b11a-48fc-922a-288785817df4@redhat.com>
On Thu, Jul 17, 2025 at 10:22:47AM +0200, David Hildenbrand wrote:
> I recall [1]. But that would, of course, only affect the RSS of a program
> and not the actual memory consumption (the large folio resides in memory
> ...).
>
> The comments in the code spells that out: "inflating the RSS of the
> process."
RSS is a pretty sucky measure though, as covered in depth by Vlastimil in
his KR 2024 talk [2]. So maybe we don't need to worry _so_ much about this
:)
[2]:https://kernel-recipes.org/en/2024/schedule/all-your-memory-are-belong-to-whom/
>
> [1] https://www.suse.com/support/kb/doc/?id=000019017
>
> --
> Cheers,
>
> David / dhildenb
>
Cheers, Lorenzo
next prev parent reply other threads:[~2025-07-17 9:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-04 3:19 Baolin Wang
2025-07-04 9:38 ` David Hildenbrand
2025-07-04 22:18 ` Andrew Morton
2025-07-06 2:02 ` Baolin Wang
2025-07-07 13:33 ` Lorenzo Stoakes
2025-07-08 7:53 ` Baolin Wang
2025-07-09 13:13 ` Lorenzo Stoakes
2025-07-15 20:03 ` Hugh Dickins
2025-07-17 8:01 ` Baolin Wang
2025-07-17 8:22 ` David Hildenbrand
2025-07-17 9:20 ` Lorenzo Stoakes [this message]
2025-07-17 9:25 ` David Hildenbrand
2025-07-17 9:19 ` Lorenzo Stoakes
2025-07-04 22:31 ` Zi Yan
2025-07-07 13:31 ` Lorenzo Stoakes
2025-07-07 15:47 ` Barry Song
2025-07-07 16:18 ` Vishal Moola (Oracle)
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