From patchwork Thu Jan 25 16:42:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 13531357 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id ED789130E3A; Thu, 25 Jan 2024 16:43:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706200993; cv=none; b=bhUNnwGksG+ppZZocD6AoyE+k9p4vHP5avAaWiKUc2KKtrYwPIlaGg5Pm/r0ufGKvNhmmTtkbG+2/Td4ja6P8KN7Ton57+HWd+pqlH/i3JydQLVEh2wZn8RnjAQxI2p02fyo9zxU+qdgEhyzvIN2o2vYhQLcxs4shpCaeppQkSc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706200993; c=relaxed/simple; bh=L8FwdsU6xsMs5YX7ltLK2e5AAE0XBTlL9IKmoi9QVAw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=U797I4sZSM/aDohn/NsXaKf4k8FO493zG2TqJo6hXIg0czH7Gb665yXpH2h/gSPUzdW5i9TEts2GapXTqyAaqStYAmw8sIqnkc70RnODKhII1RvfSSpPH6fvut6MucWHHy8ZLtZgnBlwZ0sDsRJaje/Ow4S5BtQ86SMoHtHpdNQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 B2D5A1480; Thu, 25 Jan 2024 08:43:54 -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 ADAA33F5A1; Thu, 25 Jan 2024 08:43:04 -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 v3 04/35] mm: page_alloc: Partially revert "mm: page_alloc: remove stale CMA guard code" Date: Thu, 25 Jan 2024 16:42:25 +0000 Message-Id: <20240125164256.4147-5-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125164256.4147-1-alexandru.elisei@arm.com> References: <20240125164256.4147-1-alexandru.elisei@arm.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The patch f945116e4e19 ("mm: page_alloc: remove stale CMA guard code") removed the CMA filter when allocating from the MIGRATE_MOVABLE pcp list because CMA is always allowed when __GFP_MOVABLE is set. With the introduction of the arch_alloc_cma() function, the above is not true anymore, so bring back the filter. This is a partially revert because the stale comment remains removed. Signed-off-by: Alexandru Elisei --- mm/page_alloc.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index a96d47a6393e..0fa34bcfb1af 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2897,10 +2897,17 @@ struct page *rmqueue(struct zone *preferred_zone, WARN_ON_ONCE((gfp_flags & __GFP_NOFAIL) && (order > 1)); if (likely(pcp_allowed_order(order))) { - page = rmqueue_pcplist(preferred_zone, zone, order, - migratetype, alloc_flags); - if (likely(page)) - goto out; + /* + * MIGRATE_MOVABLE pcplist could have the pages on CMA area and + * we need to skip it when CMA area isn't allowed. + */ + if (!IS_ENABLED(CONFIG_CMA) || alloc_flags & ALLOC_CMA || + migratetype != MIGRATE_MOVABLE) { + page = rmqueue_pcplist(preferred_zone, zone, order, + migratetype, alloc_flags); + if (likely(page)) + goto out; + } } page = rmqueue_buddy(preferred_zone, zone, order, alloc_flags,