From nobody Mon Apr 6 18:23:09 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 273013559F5 for ; Wed, 18 Mar 2026 20:40:15 +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=1773866416; cv=none; b=NQQpP2aCrxrwpYCKH/EWp99qPX7ORGSNYaOnVDPl+hwTXY5dyxiMGv1fcc2eQu0PrLfkfczyrym/NnpNFWC+1Eyxh8PKnaCpfKJIEKBrNA2yx7t0wF5bSiAm66gIUYgWF08eejID8EO2mP8yt90pMmqKQbhxrUr00vQpPI6RFqE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773866416; c=relaxed/simple; bh=af0POnNSVHYyaB+ZRCwPVvoBRXZ0k7zusmNNNRbS3RI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iDcAL3eFvI45P4+/Hze1tHSuwzKQtvT7tPHQm8kmuMptJlPfa+TMdGI/mgWfwZK2FtVZt+lctK0k8w73xNOctmbIEKjquGtwyc09u/sMFQB6IIAzJU7Pf9xSvgcFO3LI3joYn4RQrm5dLNCLsvXzeDURRKUOu6MK1vBkPxYwWHo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R66hjQO9; 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="R66hjQO9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 563F0C19421; Wed, 18 Mar 2026 20:40:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773866415; bh=af0POnNSVHYyaB+ZRCwPVvoBRXZ0k7zusmNNNRbS3RI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R66hjQO9gPI/+AqeZ9wyB7YmnSLhPg14m/GgYHcdPrKGGWOPEBeYRRAaW8M+mT9FM kRSvynMt0d/CyxlFDyKRzJK6uPAapKi8NjH2skSRO2QjHKXu8dVoLl77TysXPl+c+h 9Sw4lz/NdnC89NKj9VCEjDgSqhLypsRE1fxV22l/UbIPPmK3dkCpBZTUNqdRN65cGp A2SJrA0PtZEB0SFjYJDmRQIKBg5Hn3c3KgyPd258Ca+xLffH/nFRSw3ILoDUCLQfru afJ7rEtLQLN4db4HxwFSl7yWuLEeszTPu6gqmHdvSfJwTXkveFAvjEtFynMGSVTXWZ GotTE+OUZj2aw== 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 , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 6/8] mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE() Date: Wed, 18 Mar 2026 20:39:28 +0000 Message-ID: <56df2cf900132ae12e8b71ed95519b5b476e1618.1773865827.git.ljs@kernel.org> 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. Signed-off-by: Lorenzo Stoakes (Oracle) Reviewed-by: Baolin Wang --- mm/huge_memory.c | 1 - 1 file changed, 1 deletion(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 724e1de74367..015f6d679d26 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2469,7 +2469,6 @@ 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