From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 48B2D395ACC for ; Mon, 7 Sep 2026 19:57:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788811045; cv=none; b=tdZ0r/x9uDeUbFFvdXy7nNMm9IJPFEI28YFc5Y5Cq7Mkl3YF0Xh957BATY/i8n6HgOnEA21RUg+5k3/b5hSI5P9itN7gpHXQJn8pmXDkHgwEa3Q5dFBmnGGnDX/z6PMOc3Kt4mMDQrRUkUZh5Sv0lBfw5+xht8KM9gVmlkR09rQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788811045; c=relaxed/simple; bh=pmzPkbLlyTmES8XmDeuFHlp7lwmpmOCWjET1zO3XDZc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=UGdV4/biXs12hUT2P+tlTuTk9mpozfevHAKOAogqAAJQal4i01PgXwDTVw6huMz5TjGvcokebucZhDS/zOyuwbjgp6qZ7lBbuesXvJ94vLrrIfg4sm6AygdqHQsIz8NYGoFiLyMbeC4BtHMjto7DAD4UKiDaFeKehbugKq3ABg4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AZARGJ3J; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AZARGJ3J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4E8011F00A3A; Mon, 7 Sep 2026 19:57:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788811043; bh=Ylyz7JcmYkU0yb1cgId3V0zysqw0fNg7C175grvf9jg=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=AZARGJ3JcXho1RUsuyVjdmvbw7j//GWeTKUnmTOOqDFrcOb04DLK8M888yegbgDba TNvNHKASvFgEcGqWmxxzq9lXwHll1f5YIeaR2WhL9E2qg78UYK0aGBvv1oLRZwWi/0 Mk91K5b4/ffwjyre8FM4CTxP1xyPKR/GnNEvtliQY+j2NzaQEuKcDzVnWcPbtnLQ4i jgf6ef91TYslZRHYwaUBvvaPl8hRYVEnt5vib+qNBBI+sZCCSZLxOziGhKTqsU8/D8 dp8/E8NQiSSiLITWhTBKL9k1gC9ujUM677udJZTURt7n8NdTW44lhgEL5FvxlyEqNM F7McwFdaL8gpg== Message-ID: <53e7992c-5319-4533-a0d2-d0fb55cebc25@kernel.org> Date: Mon, 7 Sep 2026 21:57:16 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/huge_memory: add folio_reset_partially_mapped() To: Kiryl Shutsemau , akpm@linux-foundation.org, ziy@nvidia.com, hannes@cmpxchg.org Cc: ljs@kernel.org, usama.arif@linux.dev, lance.yang@linux.dev, baolin.wang@linux.alibaba.com, liam@infradead.org, nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, kasong@tencent.com, hughd@google.com, balbirs@nvidia.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, "Kiryl Shutsemau (Meta)" References: <20260907183340.1446132-1-kirill@shutemov.name> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/7/26 20:33, Kiryl Shutsemau wrote: > From: "Kiryl Shutsemau (Meta)" > > __folio_unqueue_deferred_split() and __folio_freeze_and_split_unmapped() > both clear PG_partially_mapped and take the folio out of > MTHP_STAT_NR_ANON_PARTIALLY_MAPPED with the same five lines. > > Move the block into folio_reset_partially_mapped() and call it from both > places. > > The helper asserts what both callers rely on: the folio is frozen, so > deferred_split_folio() cannot set the flag again under it, and the folio > is already off the deferred split queue. The list check sits behind the > flag test because order-1 folios have no _deferred_list. > > folio_order() is safe to use at this point in the split process: it > still shows the pre-split order. > > Suggested-by: David Hildenbrand (Arm) > Assisted-by: Claude-Code:claude-fable-5-1 > Signed-off-by: Kiryl Shutsemau (Meta) Thanks! Acked-by: David Hildenbrand (Arm) -- Cheers, David