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Wed, 27 Jan 2021 12:24:18 +0000 (UTC) Received: from [10.36.114.237] (ovpn-114-237.ams2.redhat.com [10.36.114.237]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4AC0A60854; Wed, 27 Jan 2021 12:24:15 +0000 (UTC) Subject: Re: [PATCH v1 2/2] mm: simplify free_highmem_page() and free_reserved_page() To: Oscar Salvador Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Andrew Morton , Thomas Gleixner , "Peter Zijlstra (Intel)" , Mike Rapoport , Michal Hocko , Wei Yang References: <20210126182113.19892-1-david@redhat.com> <20210126182113.19892-3-david@redhat.com> <20210127115122.GA28728@linux> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: <4cbbb828-016b-db98-485b-60239041cc07@redhat.com> Date: Wed, 27 Jan 2021 13:24:15 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <20210127115122.GA28728@linux> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 27.01.21 12:51, Oscar Salvador wrote: > On Tue, Jan 26, 2021 at 07:21:13PM +0100, David Hildenbrand wrote: >> adjust_managed_page_count() as called by free_reserved_page() properly >> handles pages in a highmem zone, so we can reuse it for >> free_highmem_page(). >> >> We can now get rid of totalhigh_pages_inc() and simplify >> free_reserved_page(). >> >> Cc: Andrew Morton >> Cc: Thomas Gleixner >> Cc: "Peter Zijlstra (Intel)" >> Cc: Mike Rapoport >> Cc: Oscar Salvador >> Cc: Michal Hocko >> Cc: Wei Yang >> Signed-off-by: David Hildenbrand > > Reviewed-by: Oscar Salvador > >> +#define free_highmem_page(page) free_reserved_page(page) > > Should we place that under #ifdef CONFIG_HIGHMEM to make clear > that it is only used on that config? > Maybe the #ifdefery ugliness does not pay off. Yeah, most probably not worth it. -- Thanks, David / dhildenb