From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794484458; b=ZipN+JCG6yMyz0kq7inH7dB3ktAWcPLvuIJ9gzL5/KAhdmr1yVVBaCXBASRysZnsMeiT mlZAchuIvlYOUo+t+GIhuNKRrr/3ro2clXYf+CxinBwTrpHsNv/zdYglRDj72Xny1cS1b iuOdgjpmGLWH7rcz1ONx8EWTskQf/K7G1o4HEniUqWp8CzpXrYLnl41OQgFE+P72ItlvY PuN76pizMiNUdyYgWK/Yj0Xq0JO07DqqIxB5dRWvLQ5OndNpujbKvYdlfDsdSCGIE9788 S+4FgjSzPwUwsqjCRZafpCjC9/pXdf3ynueLf61yOPkq0pU/gHtGXWMDqsUyyfUtnqw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794484458; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=AXwEBWpVcpvZcrV+jXWqjYnIWZkbHRe6QYcaP4OKLgA=; b=xzdiyvuz+5pC0udD0wraUj/N5UemgFfYZuZoVs+FxXB+rsUDrtBuWacmEJr356yeBS0i VO9tuvJUXDaOilKTdjQYelmxvKu1Ovf4Rrgk/MOS1tTwBYVkCIBvFkOFtCjyCdgaqokqB clCL40xD4FNRQbT/91TmNvmiwrnR+9GJBalsjsKiZOeXOClb2my/Lth2qqgQhCwRbawWe /iWusyfDXaMDqqilwvpNLSswLhXs4MjDzHgX17O5suvEQscsdFyU6r5TWWE3wPlnbaAQm OLy7kHs0aBNwkX2kEXWoDEsSlugY8w7iXbVBEgOI23HP82JVh8h2iPUXYqbeU3WoJgg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JShWTYBw; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EFFB5606A31C for ; Thu, 12 Nov 2026 11:54:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JShWTYBw Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2A951F00A05; Thu, 12 Nov 2026 11:54:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794484457; bh=AXwEBWpVcpvZcrV+jXWqjYnIWZkbHRe6QYcaP4OKLgA=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=JShWTYBwz3T1m0D+gMlzyAXZUOV5lZTEdKWEmPLNzsIRW+v6wGYjzrWz/3a+qlIIh uHEBwZWTzfI+8nM1pcwM53SGkhGVtDsLBHshuYSxtzNG61JCXbS2MprM5hV/RW220H EL1fsA/x1UUGroAbYZBw+qSGfyZB4AOspBYFjnzgVnaVolzaeMfQXuiyzSNiu/Vp5y FZk8uOr8DWU5XDcsKIwXsglFSq2MXx57+zvKA08GWuWTcIghT/EEC8a7yprTEzE1K1 C3sWmvVFn06QL/mupd6DGhe9ParugCE3t4qUWqqEJB1lwXJ/5dePwtcAucWejA+WvE v93jIoibDc7rw== Date: Thu, 12 Nov 2026 13:54:08 +0200 From: Mike Rapoport To: Arnd Bergmann Cc: linux-mm@kvack.org, Arnd Bergmann , Andrew Morton , Andreas Larsson , "Christophe Leroy (CS GROUP)" , Dave Hansen , "David Hildenbrand (Arm)" , Jason Gunthorpe , Linus Walleij , "Lorenzo Stoakes (ARM)" , Matthew Wilcox , Malin Jonsson , Richard Weinberger , Russell King , linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org Subject: Re: [PATCH v2 4/6] mm: drop HIGHPTE support altogether Message-ID: References: <20261112112528.1116405-1-arnd@kernel.org> <20261112112528.1116405-5-arnd@kernel.org> X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261112112528.1116405-5-arnd@kernel.org> On Thu, Nov 12, 2026 at 12:25:26PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > With both x86 and arm having dropped CONFIG_HIGHPTE support, no > architecture is left using it, so remove the remnants in common code. > > It is likely that further cleanups are possible in the page table > code but those are not obvious from the config options. > > Signed-off-by: Arnd Bergmann > --- > include/linux/hugetlb.h | 5 +---- > include/linux/mm.h | 1 - > include/linux/pgtable.h | 9 --------- > 3 files changed, 1 insertion(+), 14 deletions(-) With this and arm HIGHPTE patches applied there are still a few leftovers: $ git grep HIGHPTE arch/arm/configs/vt8500_v6_v7_defconfig:CONFIG_HIGHPTE=y mm/memory.c: * Dumping the PTE would be nice, but it's tricky with CONFIG_HIGHPTE, mm/pgtable-generic.c: * kmapped if necessary (when CONFIG_HIGHPTE), and locked against concurrent mm/userfaultfd.c: * index ordering when CONFIG_HIGHPTE is enabled. We mapped dst_pte Acked-by: Mike Rapoport (Microsoft) -- Sincerely yours, Mike.