From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 70B89182D0 for ; Tue, 29 Jul 2025 12:51:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753793462; cv=none; b=J2jnOrdWy5C94yyV2yBzjmqrQz0KtwoaE5sHQ5iOPvrGpQ87YWSXxW+uAXHXxoP3JVLHF5hp9QOS2d2zlbSYaT1iwTPISnNEWfh86Kcu0JhgX2fYRaqf1+9MhIUddvA3Nvr5Chf9VquLgHeZk1ONW4jItLsj4/2/3Tb/XPI+zRk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753793462; c=relaxed/simple; bh=1IT47AEYwCrCF+FILKOFR4N6iUJjZRYZctMo7alsby0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JB5QAsB6e4s+BOWwjxyxW/DBz9dkpjBwmoSkUZRdQrrmqWNBjGHkYn7uc/mxZ7m1D+Jo72MtXt2XfUS5794l/dga8LE4WMpxG+bGc7l20raV3FNKWWfgakDQ0IBA5gPiKrERhyJx9kvonXY3kEUUgSC1j8WwlGorJHqQvU0txBs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=f2tfzwpP; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="f2tfzwpP" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=pJjEbiV5g+NYVFXOD1NeopHaTyP4OV+DoFwiBySnRy0=; b=f2tfzwpPeWAKHfEdE1Bxz0OpBo VHp1WpTQls9sIIxpPnNlRtqNh78tB54Mv8Fs5MbF94ruMzgkyGMxsNSZOLfO4w/9GaFlngs6QT8aL 1CrUE4YaHzq3PzXFhLEo1lA7NMC6kcnj/7QZ0lsLMtQBH91taKBm6B2s4c4ktsa9CKycxPNN+Plcs 3Hv8XBZheIvN5GaPXLJqUyzThZLsNFqQ+UxBgd2HWbK/JI9QrbtIjeHC15/CgEC9/D6K626A7wbyQ IZpfXYiQtTJ4bdTIpo1iTEL6u0cMJ1sgsJXIl33unEHxkFEB3zd0k9A8VXycb2KgbjFKEoy9lE2D4 T41JJTDA==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1ugjn7-0000000CRmM-2hyh; Tue, 29 Jul 2025 12:50:49 +0000 Date: Tue, 29 Jul 2025 13:50:49 +0100 From: Matthew Wilcox To: "akash.tyagi" Cc: ziy@nvidia.com, david@redhat.com, surenb@google.com, akpm@linux-foundation.org, vbabka@suse.cz, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com, chinwen.chang@mediatek.com Subject: Re: [RFC PATCH] mm/page_alloc: Add PCP list for THP CMA Message-ID: References: <20250729123028.1224786-1-akash.tyagi@mediatek.com> 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: <20250729123028.1224786-1-akash.tyagi@mediatek.com> On Tue, Jul 29, 2025 at 06:00:28PM +0530, akash.tyagi wrote: > Additionally, android kernels create cma pcp list for pages less than PAGE_ALLOC_COSTLY_ORDER, but not for THP pages. Why bother? If it's a CMA allocaation, just free it back to CMA straight away.