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From: Mark Bundschuh <mkbund@amazon.com>
To: <muchun.song@linux.dev>, <akpm@linux-foundation.org>
Cc: <osalvador@suse.de>, <david@kernel.org>, <jiaqiyan@google.com>,
	<linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
	Mark Bundschuh <mkbund@amazon.com>
Subject: Re: [PATCH v2] mm/hugetlb: add htlb_dissolve vmstat event
Date: Tue, 10 Nov 2026 22:57:34 +0000	[thread overview]
Message-ID: <20261110225734.3549172-1-mkbund@amazon.com> (raw)
In-Reply-To: <D6862DF6-34D8-44B9-8412-B241812F6754@linux.dev>

Hi Andrew and Muchun,

Thanks, fair questions. Some context: a management agent offlined memory
blocks on a host using huge pages. Each offline dissolved the free huge
pages in the block and lowered nr_hugepages, and later the workload
failed to get its pages. It took me a while to work out that the
offlines, not another process writing to nr_hugepages, were what had
shrunk the pool. The counter was meant to make that visible.

Thinking about it more, the offline itself is already visible (a
successful offline sends a uevent, and auditctl can log who started it).
So I don't think this needs a counter. Please drop it.

Thanks,
Mark

      reply	other threads:[~2026-11-10 22:57 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-05 19:15 Mark Bundschuh
2026-11-05 23:39 ` Andrew Morton
2026-11-06  3:50 ` Muchun Song
2026-11-10 22:57   ` Mark Bundschuh [this message]

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