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Tue, 1 Sep 2020 08:22:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1598973778; bh=oM6M8l0ba8Kwr86wVvWOr0ibc9GeoVF02RI3gdpRvZg=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=QlglmDYfmn+LUmPHNl9G1vxZ4WANgTGEDBcv3VoTq5jkCobGzHRwV7MDXP/8CkPRF DlnAvyJzmngr5D0/wC86DqyXRPVdp/OwUQc4zsVd3Mrk54apOxtDVbGKnBnOuqrFqS /e8+ps58Vp9230FkQlqzYQQbltdvuVP33ee7Vxcw= Message-ID: <1598973776.4238.11.camel@HansenPartnership.com> Subject: Re: [PATCH 07/28] 53c700: improve non-coherent DMA handling From: James Bottomley To: Matthew Wilcox Cc: Christoph Hellwig , Mauro Carvalho Chehab , Thomas Bogendoerfer , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Ben Skeggs , Pawel Osciak , Marek Szyprowski , Matt Porter , iommu@lists.linux-foundation.org, Tom Lendacky , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-samsung-soc@vger.kernel.org, nouveau@lists.freedesktop.org, netdev@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, linux-mm@kvack.org, alsa-devel@alsa-project.org Date: Tue, 01 Sep 2020 08:22:56 -0700 In-Reply-To: <20200901150554.GN14765@casper.infradead.org> References: <20200819065555.1802761-1-hch@lst.de> <20200819065555.1802761-8-hch@lst.de> <1598971960.4238.5.camel@HansenPartnership.com> <20200901150554.GN14765@casper.infradead.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4A96B18038E71 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 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, 2020-09-01 at 16:05 +0100, Matthew Wilcox wrote: > On Tue, Sep 01, 2020 at 07:52:40AM -0700, James Bottomley wrote: > > I think this looks mostly OK, except for one misnamed parameter > > below. Unfortunately, the last non-coherent parisc was the 700 > > series and I no longer own a box, so I can't test that part of it > > (I can fire up the C360 to test it on a coherent arch). > > I have a 715/50 that probably hasn't been powered on in 15 years if > you need something that old to test on (I believe the 725/100 uses > the 7100LC and so is coherent). I'll need to set up a cross-compiler > ... I'm not going to say no to actual testing, but it's going to be a world of pain getting something so old going. I do have a box of older systems I keep for architectural testing that I need to rummage around in ... I just have a vague memory that my 715 actually caught fire a decade ago and had to be disposed of. James