From: Andrew Morton <akpm@linux-foundation.org>
To: Mark Bundschuh <mkbund@amazon.com>
Cc: <muchun.song@linux.dev>, <osalvador@suse.de>, <david@kernel.org>,
<jiaqiyan@google.com>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] mm/hugetlb: add htlb_dissolve vmstat event
Date: Thu, 5 Nov 2026 15:39:45 -0800 [thread overview]
Message-ID: <20261105153945.e4a6415d8d0e8742887e9a86@linux-foundation.org> (raw)
In-Reply-To: <20261105191508.1021974-1-mkbund@amazon.com>
On Thu, 5 Nov 2026 19:15:08 +0000 Mark Bundschuh <mkbund@amazon.com> wrote:
> Memory offline and memory failure handling dissolve free hugetlb folios
> and lower nr_hugepages. Nothing records this, so when the pool shrinks
> it is hard to tell whether that or a write to nr_hugepages caused it.
Can we please have a much more detailed explanation of the motivation
for this? I assume it's for the benefit of ops people, but why do they
want this and how will it be used, etc? y'know, that old use-case
thing.
> Add an htlb_dissolve event, counted for each free folio that
> dissolve_free_hugetlb_folio() takes out of the pool.
I'm wondering why it doesn't account offline and memory-failure
separately but without the above info I'm at a loss!
Thanks.
next prev parent reply other threads:[~2026-11-05 23:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-05 19:15 Mark Bundschuh
2026-11-05 23:39 ` Andrew Morton [this message]
2026-11-06 3:50 ` Muchun Song
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