From nobody Sat Apr 4 04:48:20 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 364DB3DEAF4 for ; Fri, 20 Mar 2026 18:07:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774030070; cv=none; b=nTKiS1ZaXlYNiab+/iUQAENnmD5iyOh78qYFKM+zhA1+qdjDjTI1++99uhPldBEzxxIt+szU91skmZfq2Og1Q27MqZrXorimRq/GqpbUI11zIXQ7vnqtrN06Dxi6DvQ1rn4cmCF931x9D+RJHNMKykA0uiYpHS6D3Jh1l1b7Wj0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774030070; c=relaxed/simple; bh=T6ecK45s9Uwsgz6Ib7sYknOiCaTzzdT93VdENnaa6Ac=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oVsWkWdzgM8/8zB6vqS6Lb/Ir9S2B8recEzpR58K7X8scLeGOLNDT42+KiGHNeBKc4kj1KjQYMf9bM/ckj/q5sNVwIGQS9/7iRBfGV8bV8aoOXpAw2yaBfhe0fXvPiwK48RN4372ig7q51AbS/xWLvQWHT10RDX4NmndzmfmBZw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=h4BPbH29; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="h4BPbH29" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8FCBAC2BCAF; Fri, 20 Mar 2026 18:07:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774030070; bh=T6ecK45s9Uwsgz6Ib7sYknOiCaTzzdT93VdENnaa6Ac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=h4BPbH29BVr91MzEuSzgIx6CdXy4kih1RxRTEx5sa0mOh3zp+4OiXv3XaegdadVPx V5N4CNgx/H7wmHm7GW0Zoklg2FEbEwwNipTe5TFxfa2U5zguUNQ4HoGK045B1ovHa7 SoVaD7InCps6sRdcPgB7vQJCOKkpKQxSG2uDO2qG3ZGlwnlEf35/yx+kiIVGG28uG7 uh/fo/k2BaWuOi7W4077ogPlVVMrWSK+9gSuNoRlv98dIx2LGZcYzQNxNDQnfOdJm0 BVSexAWDwkIdfyQzhpP9bT5oYRf5T4nY1YC7wuILcRjSnBluxAsLLh534poxGCqJDK MfGrawTbPgGUA== From: "Lorenzo Stoakes (Oracle)" To: Andrew Morton Cc: David Hildenbrand , Zi Yan , Baolin Wang , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Kiryl Shutsemau , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 06/13] mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE() Date: Fri, 20 Mar 2026 18:07:23 +0000 Message-ID: X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This has been around since the beginnings of the THP implementation. I think we can safely assume that, if we have a THP folio, it will have a head page. Reviewed-by: Baolin Wang Signed-off-by: Lorenzo Stoakes (Oracle) Reviewed-by: Suren Baghdasaryan --- mm/huge_memory.c | 1 - 1 file changed, 1 deletion(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index b9d9acfef147..4add863cd18f 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2375,7 +2375,6 @@ bool zap_huge_pmd(struct mmu_gather *tlb, struct vm_a= rea_struct *vma, folio =3D page_folio(page); folio_remove_rmap_pmd(folio, page, vma); WARN_ON_ONCE(folio_mapcount(folio) < 0); - VM_BUG_ON_PAGE(!PageHead(page), page); } else if (pmd_is_valid_softleaf(orig_pmd)) { const softleaf_t entry =3D softleaf_from_pmd(orig_pmd); =20 --=20 2.53.0