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Date:   Thu, 11 Aug 2022 09:38:40 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Michal Hocko <mhocko@suse.com>
Cc:     Baoquan He <bhe@redhat.com>, Christoph Hellwig <hch@lst.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        John Donnelly <john.p.donnelly@oracle.com>,
        David Hildenbrand <david@redhat.com>, linux-mm@kvack.org,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] dma/pool: do not complain if DMA pool is not allocated
Message-ID: <20220811073840.GE13886@lst.de>
References: <YupFSpXOrcfXJNya@dhcp22.suse.cz> <YuqNToCACD8kKBG+@MiWiFi-R3L-srv> <YuqOrJKcgfamdXkk@dhcp22.suse.cz> <YuqU87SDwP0zg+c7@MiWiFi-R3L-srv> <YuqX0OAItlMDfRUV@dhcp22.suse.cz> <YuunCO2lsLDWTGw+@MiWiFi-R3L-srv> <Yuu1EyC95XL98XNI@dhcp22.suse.cz> <Yu0OWLbzLxCkSGVJ@MiWiFi-R3L-srv> <Yu1VTAxd9/jP/iEk@dhcp22.suse.cz> <YvJ/V2bor9Q3P6ov@dhcp22.suse.cz>
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On Tue, Aug 09, 2022 at 05:37:59PM +0200, Michal Hocko wrote:
> Here we go again.

And just as last time I think this is the wrong thing to do.
IFF we actually need the pool and we can't allocate it we want this
warning.

But order-10 seems very larger for the 31-bit ISA DMA zone, so we might
want to look into calculating the pool size based on the zone size
instead.