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Wed, 10 Aug 2022 06:40:43 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id /C2RAutS82KVPgAAMHmgww (envelope-from ); Wed, 10 Aug 2022 06:40:43 +0000 Date: Wed, 10 Aug 2022 08:40:42 +0200 From: Michal Hocko To: Andrew Morton Cc: Baoquan He , Christoph Hellwig , John Donnelly , David Hildenbrand , linux-mm@kvack.org, LKML Subject: Re: [PATCH] dma/pool: do not complain if DMA pool is not allocated Message-ID: References: <20220809183252.d168b5a8be31fff5aeef1b3e@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220809183252.d168b5a8be31fff5aeef1b3e@linux-foundation.org> ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1660113645; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=TF9qkQ4HKALrlOe0bqxeqVLGWf0XkDPHOA6absoSUU8=; b=JwIlvTBn0FnBZGesQkPmKSwQ4/AMKD3IufxzLbOSoYHEGtDp9AeiRAVwd8TrOeb08HZsQw Xi805rYKyWYggscMz11Nxa0i9BqbwXyzFXIfntg7SlomMGxxqzjTUwoaj58nNWZzGT1z6V olU2JnoVSvCGkyAxOVUPVelBQgAaMh0= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=TQ5V2ram; dmarc=pass (policy=quarantine) header.from=suse.com; spf=pass (imf26.hostedemail.com: domain of mhocko@suse.com designates 195.135.220.28 as permitted sender) smtp.mailfrom=mhocko@suse.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1660113645; a=rsa-sha256; cv=none; b=zoEC1LHWRoEoMbI9Q5pYvCZHGvjPrUDGXfxoMbJNToH3JQVDm1m34TLQwUKpPZ0SqPIvX7 zpTcFlT+01VBQ7k/XgJglWhH9nAEXVH168vYDL+Y8Gn2BKqxn437m7D4bs+TinKsY1Ixkj piuZ/etjEcI3lQVVjF20NjeL3+CNJ4k= Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=TQ5V2ram; dmarc=pass (policy=quarantine) header.from=suse.com; spf=pass (imf26.hostedemail.com: domain of mhocko@suse.com designates 195.135.220.28 as permitted sender) smtp.mailfrom=mhocko@suse.com X-Rspamd-Server: rspam02 X-Stat-Signature: 6rsjdj66hoaaxhr5s1caosnf16kibo3f X-Rspamd-Queue-Id: AB760140183 X-Rspam-User: X-HE-Tag: 1660113644-37845 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 Tue 09-08-22 18:32:52, Andrew Morton wrote: > On Tue, 9 Aug 2022 17:37:59 +0200 Michal Hocko wrote: > > > we have a system complainging about order-10 allocation for the DMA pool. > > > > I'll add a cc:stable to this - if future users like the patch, so will > current ones! Technically speaking this is not a fix so I am not sure the stable tree is really a great fit. On the other hand I am definitely going to backport this to older SLES kernels because we have had at least 2 reports where this has been brought up for clarification. That being said, no objection from me. -- Michal Hocko SUSE Labs