From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.81 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794198424; b=KjnV35p9Ahaoh+aIgtYU54SWgYSDJmBDzLkM7ikOfV7YA5ghmlfFTBygnZWzCXpWWI9l 2xvzG2TPCgeuMZoxvl7bDjJuLMtr/3ycrx6A4lz+ItWwT8GOWYW/NpU0GMNdTWnRqeYq/ 7E6qZY30D0xgXSOXTHfrbnH6IaMQ2tUsMcD5MbF0fCLVCHy5a1n4WOgSXnPyIPfLqkvIx jnpGmDk69/GWyJKnKN2OPWqBj7Q7zq5Lj+i4TM4FuMD0FF9ytdre4H21AgHy2y+1f1Hry A/y2z2WVbhmmFVYKXx1i6z0kNaaD+4f99r+3Hx+tphS84mghjptkktbe2G50/6vtXvA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794198424; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version:Content-Type: Content-Transfer-Encoding; bh=0SVPjoU02fufplg6UCU1lm8OR+hTiBw+cX99Xog7iH4=; b=Jx6DA+Bxmpp2LjCK2VMbq8r5WIebsCxG0gCM8FG6p2hdcKAMY3yTFg0c2Z1k4sjMSpJU CZbDeO/Xi82lm23oUk6hDAlICO6kZTW2zc1NiSEcq+PfwFXs9GVklbo8epyn/bkobImE4 7WHZcO0qTlWcfTYQXRg4bWI5yRNXoIvzFnVuAM5TuS1C8ApWbggYNbNPdpSi3k+YWq2e5 3EXrIJHAx2Nvi2z8RZnniz/gFewxb94q7JPvLCOvEWXqGWUzX5KBXDtrgNXagZCm67O+f vHN5YcSNwzqyJSam1H7TR5mXIP6Ygddb3kfnnF4/1JasyGMWnEcCCg5inESLRc3y37Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; arc=none smtp.remote-ip=91.218.175.81 Received: from mta0.migadu.com (out-81.mta0.migadu.com [91.218.175.81]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 19062606A31C for ; Mon, 9 Nov 2026 04:26:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 19062606A31C Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev X-Envelope-To: loongarch@lists.linux.dev DKIM-Signature: a=rsa-sha256; bh=0SVPjoU02fufplg6UCU1lm8OR+hTiBw+cX99Xog7iH4=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794198415; v=1; x=1794803215; b=u/Gx8aBgnHUkuXVi2+BQTYcTDxH8zFUmAR/TVFAy46WVUw8Lm9l8nbKAhmANIRo5EFy9lMew uqhCIgOleT3njpCY3/Dv7cMDqi4bwx/iXr8FHzCyP+4xEO4rb2Uae+SFRzrmb+HNtjjXKcUWcSf Benz8ZX3QBGriDvnxTFBIbfA= X-Envelope-To: loongarch@lists.linux.dev Received: by smtp.migadu.com with ESMTPS id b6a087d0e32380d8; Mon, 09 Nov 2026 04:26:54 +0000 X-Mizu-Trace-ID: b6a087d0e32380d8 X-Migadu-Flow: FLOW_OUT From: Lance Yang To: songmuchun@bytedance.com Cc: david@kernel.org, maddy@linux.ibm.com, rppt@kernel.org, akpm@linux-foundation.org, lance.yang@linux.dev, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, ritesh.list@gmail.com, sshegde@linux.ibm.com, osalvador@suse.de, qi.zheng@linux.dev, muchun.song@linux.dev, chenhuacai@kernel.org, kernel@xen0n.name, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, x86@kernel.org, loongarch@lists.linux.dev, linux-s390@vger.kernel.org Subject: Re: [PATCH v3 2/5] powerpc/mm: drop powerpc vmemmap_can_optimize() Date: Mon, 9 Nov 2026 12:26:47 +0800 Message-ID: <20261109042647.37323-1-lance.yang@linux.dev> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20261107043122.25650-3-songmuchun@bytedance.com> References: <20261107043122.25650-3-songmuchun@bytedance.com> X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Sat, Nov 07, 2026 at 12:31:19PM +0800, Muchun Song wrote: >Whether the optimized mapping can be used is now decided in the >architecture-specific vmemmap_populate() path. When PowerPC has to fall >back, such as on Hash MMU, it can disable optimization for the populated >vmemmap range there. > >Add section_vmemmap_optimization_disable() to centralize this fallback, >use it in the Hash MMU path, and drop the radix-specific >vmemmap_can_optimize() override. > >Signed-off-by: Muchun Song >--- LGTM, feel free to add: Reviewed-by: Lance Yang