linux-kernel - Re: [PATCH v2 2/2] dma-contiguous: Use fallback alloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAK7LNATYOLEboUTO4qPx2z7cqwDrHBO1HFHG8VzZEJ15STv+nw@mail.gmail.com>
Date:   Tue, 27 Aug 2019 16:45:20 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Nicolin Chen <nicoleotsuka@...il.com>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Robin Murphy <robin.murphy@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>, vdumpa@...dia.com,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Tony Lindgren <tony@...mide.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Thierry Reding <treding@...dia.com>,
        Kees Cook <keescook@...omium.org>, iamjoonsoo.kim@....com,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-xtensa@...ux-xtensa.org, iommu@...ts.linux-foundation.org
Subject: Re: [PATCH v2 2/2] dma-contiguous: Use fallback alloc_pages for
 single pages

On Mon, Aug 26, 2019 at 4:33 PM Christoph Hellwig <hch@....de> wrote:
>
> On Mon, Aug 26, 2019 at 11:05:00AM +0900, Masahiro Yamada wrote:
> > This is included in v5.3-rc6
> > so I tested it.
>
> So there is no allocation failure, but you get I/O errors later?

Right.

>
> Does the device use a device-private CMA area?

Not sure.
My driver is drivers/mmc/host/sdhci-cadence.c
It reuses routines in drivers/mmc/host/sdhci.c



>  Does it work with Linux
> 5.2 if CONFIG_DMA_CMA is disabled?

No.
5.2 + disable CONFIG_DMA_CMA
failed in the same way.




-- 
Best Regards
Masahiro Yamada