From mboxrd@z Thu Jan 1 00:00:00 1970 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 24B8D3E92BF; Thu, 19 Mar 2026 16:18:41 +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=1773937122; cv=none; b=jk3OVnBhwgAXeQ2/QbQy+G7XvomTD7+mNLl3XVxurBkeydAoUDpEa1vU977ZrUF4LS/Ps/2d030e/t50fRRgJ1RKySzkN+Meb005qF6b1Wtk2+xYP43i88sveIo05uMPkD1Cu5ifJ212TDHQSBXiSiRRdcteZ53UKxIzzFY0EnU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773937122; c=relaxed/simple; bh=+rJxXvh9jbY/cYu63rGxCHb0s8bdU5IuTtrr+qf/8ms=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=L//53MzZwIws7mJFByd1GiZ2KQthHwntPOgW9OJD4adBtUN4ntwMKwtYDxRyPbH5aqBPw3UzzXNiiwxRmT3uTag/LRkg0sS75KnLEOkKBEej4IJ3ISvixM6uhgObtxPoKYEU1GldVChrRhbjB/ff+e8vASdkrpgYGm+MJh5T+cE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SAhj5GuC; 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="SAhj5GuC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7F5EDC19424; Thu, 19 Mar 2026 16:18:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773937121; bh=+rJxXvh9jbY/cYu63rGxCHb0s8bdU5IuTtrr+qf/8ms=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=SAhj5GuC0PfaoylzOpmZEg5wivkofnQ+GtRsdaeJOUJ4uAmHeX9yWUjJtJAn3it/L DtIYhs/uZLj/VchTSC0AmON6+W7EzTrZwPGqVuCyAhjCjaHPnhkABYQUeqprmOj1i/ R/FWq7IVvWU1IGMy9FTlbHxdCNuIq9kR2X6GzLnLDJQbozNo/mkx2YeXRGXNiMY0o7 vQpts1+55w++E8C9ighzin4xwksBwu0yd2u4NfBf4vlh8psPZ69uaMIHcyWDj4a0OE UwiaTPNnXiiVy+7V9ISLDkx2gH43hmidRMy6gz3GsbPkAVEku6PbjeRjw4rot/k9lf Rn92JSY6yNwyg== Date: Thu, 19 Mar 2026 18:18:22 +0200 From: Mike Rapoport To: "David Hildenbrand (Arm)" Cc: linux-kernel@vger.kernel.org, Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH 1/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE Message-ID: References: <20260319-config_migration-v1-0-42270124966f@kernel.org> <20260319-config_migration-v1-1-42270124966f@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260319-config_migration-v1-1-42270124966f@kernel.org> On Thu, Mar 19, 2026 at 09:19:40AM +0100, David Hildenbrand (Arm) wrote: > All architectures that select CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE also > select CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG. So we can just remove > CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE. > > For CONFIG_MIGRATION, make it depend on CONFIG_MEMORY_HOTREMOVE instead, > and make CONFIG_MEMORY_HOTREMOVE select CONFIG_MIGRATION (just like > CONFIG_CMA and CONFIG_COMPACTION already do). > > We'll clean up CONFIG_MIGRATION next. > > Signed-off-by: David Hildenbrand (Arm) Reviewed-by: Mike Rapoport (Microsoft) > --- > arch/arm64/Kconfig | 1 - > arch/loongarch/Kconfig | 1 - > arch/powerpc/Kconfig | 1 - > arch/riscv/Kconfig | 1 - > arch/s390/Kconfig | 1 - > arch/x86/Kconfig | 1 - > mm/Kconfig | 9 +++------ > 7 files changed, 3 insertions(+), 12 deletions(-) > > diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig > index edc927d9e85a..d01800962d84 100644 > --- a/arch/s390/Kconfig > +++ b/arch/s390/Kconfig > @@ -85,7 +85,6 @@ config S390 > select ARCH_32BIT_USTAT_F_TINODE > select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE > select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM Not really related, but s390 does not have anything but SPARSEMEM_VMEMMAP. > - select ARCH_ENABLE_MEMORY_HOTREMOVE > select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 > select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE > select ARCH_HAS_CC_CAN_LINK -- Sincerely yours, Mike.