From nobody Mon Apr 6 13:29:14 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 E652E3D4100 for ; Thu, 19 Mar 2026 13:00:36 +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=1773925237; cv=none; b=TbWnINfv+d7nYyBkYlgKj8dMP7/A1SHMUO3x9C6nMi7KHTE6UrjwJj9hjj+1T7fkZxGeQvMoYuJPhU0kNNGKpfNLK5h2god4v4bqfr8OhJx3LbyMwOp/9bEevYHJ/ZlUJ1tp2MwGWcLizf7jMyNSYK1rFhvzt605oXylVYQXwHI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773925237; c=relaxed/simple; bh=kspbMybLh+6i/a3mVmNNauCT4x2DdLe5LLqLRnb3Wp4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=e2jtiqIfRi4iPbVZrhLrRtKW4u0ZdaQJjzmTN0XrrcHe7uAf8M/S11hUdvlu41OvI/5BK8V1EMspGfpkUDPcFsvAcmSZbTiVJtTe021rmemIKqa54cTPwUY91qaSDG4ckXsfuYUpttwRguJrZtK8kvpLlyeNDOgmvpMYPjEDN6c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=H9Vr0NmT; 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="H9Vr0NmT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E847C2BCB1; Thu, 19 Mar 2026 13:00:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773925236; bh=kspbMybLh+6i/a3mVmNNauCT4x2DdLe5LLqLRnb3Wp4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H9Vr0NmTzWFMhiAdsOMnHQ4dQ0Vgay553D0KhLhBvx3FWZt+EvoVQ7ghnu3Jiz7sG 6PC2ST2bgoPmgPo0lSUWJwDucyW3ohWywV+qU750kSjpA27k0OemOj6VdE6l/oiqw2 w4ka2IJ39V1QPp3vg+toosfQoKGw12V1oRozuTdZGM8AERILwgIwYxDO38n7c5C0Bv r3+YW1EB59c8Fk3dXZJTpxBxBRBRrHcYfrogXP7SMq5T+R3h3/l6pr8yfBphmjlfj2 MMz8dj26355XtxZ3rRyV2exYN80/h9pW3feKhvCWEHKavP0oU4PZrgpSR3e8/PYTGh tyIo3aHVF7Dmg== 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 v2 6/9] mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE() Date: Thu, 19 Mar 2026 13:00:12 +0000 Message-ID: <3fcbddfbfd0408364fad4548be83455a59d17f79.1773924928.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 c84b30461cc5..499c31bf8f83 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2468,7 +2468,6 @@ 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