From patchwork Sun Nov 19 16:57:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 13460594 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6FA97C072A2 for ; Sun, 19 Nov 2023 16:58:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=09fHrmOtmDfr3Lkdi7WvV7FSqzukdIR8L3OZtsjQXRA=; b=j44iWSRhAsrStm MdHBPZcXoxsNvBYmRRlTZ726MoG2PEQJvUn+n5OB/tFWHsRpz+n2BYkqfWL6lt8l8T9U7D7JpTLOW ZnnOulvuq6nwPiChkc6vdi9QGMfh4lVFE8vxX7lgPH3YJ2lpSLnZWoyJKAeR5pV+za6mGE8NQdE5m UQl7jX9Eqq6bsY0CYd/pmdlHxBA61aa6QOVh0F6G7kVxnqtRjlHaoYHNsRjFnqnjec+GVoAhJW6QZ MO11uAy501e4NgkJo6OvqttMyFKECZdFKewTn5y+ozMF5wmhDHluCvLR1kA66s+OoO5vZF2gFdx5D EvgSnwsFrDwYHIWtphKw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r4l7q-00AQhG-20; Sun, 19 Nov 2023 16:58:26 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r4l7i-00AQa7-0L for linux-arm-kernel@lists.infradead.org; Sun, 19 Nov 2023 16:58:20 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 967AFDA7; Sun, 19 Nov 2023 08:59:02 -0800 (PST) Received: from e121798.cable.virginm.net (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6F4F03F6C4; Sun, 19 Nov 2023 08:58:11 -0800 (PST) From: Alexandru Elisei To: catalin.marinas@arm.com, will@kernel.org, oliver.upton@linux.dev, maz@kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, arnd@arndb.de, akpm@linux-foundation.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, mhiramat@kernel.org, rppt@kernel.org, hughd@google.com Cc: pcc@google.com, steven.price@arm.com, anshuman.khandual@arm.com, vincenzo.frascino@arm.com, david@redhat.com, eugenis@google.com, kcc@google.com, hyesoo.yu@samsung.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: [PATCH RFC v2 07/27] mm: page_alloc: Add an arch hook to filter MIGRATE_CMA allocations Date: Sun, 19 Nov 2023 16:57:01 +0000 Message-Id: <20231119165721.9849-8-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231119165721.9849-1-alexandru.elisei@arm.com> References: <20231119165721.9849-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231119_085818_246409_6BADF164 X-CRM114-Status: GOOD ( 10.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org As an architecture might have specific requirements around the allocation of CMA pages, add an arch hook that can disable allocations from MIGRATE_CMA, if the allocation was otherwise allowed. This will be used by arm64, which will put tag storage pages on the MIGRATE_CMA list, pages which have specific limitations. Signed-off-by: Alexandru Elisei --- include/linux/pgtable.h | 7 +++++++ mm/page_alloc.c | 3 ++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 3f34f00ced62..b7a9ab818f6d 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -884,6 +884,13 @@ static inline int arch_prep_new_page(struct page *page, int order, gfp_t gfp) static inline void arch_free_pages_prepare(struct page *page, int order) { } #endif +#ifndef __HAVE_ARCH_ALLOC_CMA +static inline bool arch_alloc_cma(gfp_t gfp) +{ + return true; +} +#endif + #ifndef __HAVE_ARCH_UNMAP_ONE /* * Some architectures support metadata associated with a page. When a diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 86e4b1dac538..0f508070c404 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3167,7 +3167,8 @@ static inline unsigned int gfp_to_alloc_flags_cma(gfp_t gfp_mask, unsigned int alloc_flags) { #ifdef CONFIG_CMA - if (gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE) + if (gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE && + arch_alloc_cma(gfp_mask)) alloc_flags |= ALLOC_CMA; #endif return alloc_flags;