From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 ED8C33DF002 for ; Thu, 24 Sep 2026 20:40:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790282408; cv=none; b=ojITN5cAsh7e0HI2gSBb3UbXo+nPB/PrtEF1lwBpcl+WMXBBYChfTlcBR82CI2bh7s3xoTxBF1NJ6+rdDrwzb2/+c7PMhNsCjeDdBnGvgfIvx4N0TvG7yrZiRYxXQ1B6oHA+PRNDx/FqRzUA6FEqWQMoHCHDh6xqVaBgpArPkf0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790282408; c=relaxed/simple; bh=eJlQXcXw5T4VE2+tq/sQHJKepgsPLtuY2fDFdZyHJnI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=oxmmyRIj56CzPCOvavMT4eWnM9L9Od9hSiop7ydPM/VgSNuBjPGy0cqdJCmOvSpDfFNy2x94ScJHJnG6H5PeLnZ5vwWsnq7Zn2arGORkJq5VMGcnmEBl12vnb5uSFaOuo9qISA5tMd+lNjr3nWVhu4c1Qa/uMp6S3ug/aPVsQzM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FamxgVkd; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FamxgVkd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67F491F000FF; Thu, 24 Sep 2026 20:39:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790282406; bh=xlGcEMzcjTLozgQ20Llz9sQekvSUQelUVLMzmAiWMJM=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=FamxgVkdLEEmbveMA8pTCxCu1c6ZAb2VAOytitnlu3ysj1jxXOW4qM9zV76xAi6oJ BWK7L0L/k7vNj5JbdYPFR4PzT7WeQIguM7IyZA2bLGzVzaypUv8ZdbGHtuhT1zPMWt GuLt1eHSoXYfZezrE+6yXodubV7sb1ZWdIoCb5p7H6Xs4s/0dvMOneS8xXvikSNxFa kMtIg8Bp1Rgu++ym0EQaX98WCju3eB+ceIf+CRBo9h/owvW3uQ4vj1mGOzIxm42p7+ 5TbpxkZQEU8G7buktVirdE4Fond48Ur/j8A70OzayBOaQNxbwlcrT8RLAhqyiIn6zu Dab0eQZp1mqTw== Message-ID: <3710ab57-035c-4914-9fdf-0827b1144c97@kernel.org> Date: Thu, 24 Sep 2026 22:39:54 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 7/7] mm: use VMA flag helpers in NUMA balancing To: Gregory Price , linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, akpm@linux-foundation.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, 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, vschneid@redhat.com, kprateek.nayak@amd.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev, kas@kernel.org, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, ying.huang@linux.alibaba.com, apopple@nvidia.com, jannh@google.com, pfalcato@suse.de, hannes@cmpxchg.org, shy828301@gmail.com, raghavendra.kt@amd.com References: <20260922182928.2199090-1-gourry@gourry.net> <20260922182928.2199090-8-gourry@gourry.net> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/22/26 20:29, Gregory Price wrote: > From: "Gregory Price (Meta)" > > Use vma_test() instead of accessing vm_flags directly in the NUMA > balancing code touched by the preceding fixes. Keep the existing flag > predicates unchanged. > > No functional change intended. > > Suggested-by: Lorenzo Stoakes > Link: https://lore.kernel.org/r/aq1FDhy00epXXtgd@gremlin > Assisted-by: LLM > Signed-off-by: Gregory Price (Meta) > --- > kernel/sched/fair.c | 3 ++- > mm/internal.h | 2 +- > mm/migrate.c | 2 +- > 3 files changed, 4 insertions(+), 3 deletions(-) > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > index 412c72084a63d..0d48d595740bf 100644 > --- a/kernel/sched/fair.c > +++ b/kernel/sched/fair.c > @@ -4224,7 +4224,8 @@ static void task_numa_work(struct callback_head *work) > * under cache pressure can drive considerable bandwidth. > */ > placement_scan = !(vma->vm_file && > - (vma->vm_flags & (VM_READ | VM_WRITE)) == VM_READ); > + vma_test(vma, VMA_READ_BIT) && > + !vma_test(vma, VMA_WRITE_BIT)); > Indentation looks wrong. Apart from that LGTM (did not check if there are other cases). -- Cheers, David