From mboxrd@z Thu Jan 1 00:00:00 1970 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 B90BEC47422 for ; Mon, 29 Jan 2024 11:46:35 +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:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=y/H1PPWZLtPd6bRcTv3Ytca0Rx43nSz+4ZZeJdV4hhk=; b=BHvGEUFH5OfwvU NfljXlzBcyisKs5fT+vbgYwosRH6uF6DRXKPui7LNQzsMXh1xqpWYKOPRl6QgcQcnBGfZbWP/vge9 0pwIh6HeK4fxj/vOHxzsq6hs01Je2Oi38ib/j+dyY2/ZP7UIcfel7K/URfA6BM48Qw2yaKtY9EbHh RQveu/ZIH+Nw0UaVUIn0/U2Fgj6kIjIP7G/njae3pTOo9rU6dKCWR1/VAD57ws9J9fxmlsTw10b5f 9vWtmfN0sqfOIhQGjs6ssmEIYNy9t587MC1iqDjk9Miv7R4DlC5oaH2Vv9qj5QqA6He7fiClH4Hda 0xCa/IZ6U5ZVRlLY3CLA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUQ5o-0000000CRem-2Vx7; Mon, 29 Jan 2024 11:46:24 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUQ5l-0000000CRcm-1ENH for linux-arm-kernel@lists.infradead.org; Mon, 29 Jan 2024 11:46:22 +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 2E09CDA7; Mon, 29 Jan 2024 03:47:04 -0800 (PST) Received: from raptor (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0040D3F5A1; Mon, 29 Jan 2024 03:46:14 -0800 (PST) Date: Mon, 29 Jan 2024 11:46:12 +0000 From: Alexandru Elisei To: Anshuman Khandual Cc: 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, pcc@google.com, steven.price@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: Re: [PATCH RFC v3 04/35] mm: page_alloc: Partially revert "mm: page_alloc: remove stale CMA guard code" Message-ID: References: <20240125164256.4147-1-alexandru.elisei@arm.com> <20240125164256.4147-5-alexandru.elisei@arm.com> <966a1a84-76dc-40da-bde2-251d2a81ee31@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <966a1a84-76dc-40da-bde2-251d2a81ee31@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240129_034621_484893_85B55080 X-CRM114-Status: GOOD ( 20.45 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On Mon, Jan 29, 2024 at 02:31:23PM +0530, Anshuman Khandual wrote: > > > On 1/25/24 22:12, Alexandru Elisei wrote: > > 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 makes sense as arch_alloc_cma() now might prevent ALLOC_CMA being > assigned to alloc_flags in gfp_to_alloc_flags_cma(). Can I add your Reviewed-by tag then? Thanks, Alex > > > > > 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, _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel