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From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Ulf Hansson <ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Aaro Koskinen <aaro.koskinen-X3B1VOXEql0@public.gmane.org>,
	Nicolas Pitre <nico-vtqb6HGKxmzR7s880joybQ@public.gmane.org>,
	"linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>,
	Linux Kernel Mailing List
	<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"list-Y9sIeH5OGRo@public.gmane.org:IOMMU DRIVERS
	<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
	Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
	"
	<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
	Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>,
	linux-omap <linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
	Linux ARM
	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: remove block layer bounce buffering for MMC v2
Date: Fri, 8 Mar 2019 10:18:53 +0100	[thread overview]
Message-ID: <20190308091853.GA14021@lst.de> (raw)
In-Reply-To: <CAPDyKFr6gDYttazFJJzyFm04qiy=9oQAeW9a-cFxHE1vP+DhLA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

On Mon, Feb 25, 2019 at 02:54:13PM +0100, Ulf Hansson wrote:
> This looks good to me, however the lack of feedback/tests worries me a
> bit. So, unless you think it's a bad idea, I intend to apply this when
> v5.1 rc1 is out, which allows a lengthy test period in linux-next.

Please don't rush to merge this.  Based on a talk to some folks I
have an idea for a sg iterator that can hide the kmapping from
the drivers, which should allow for some less scary driver code and
clean this up a bit further.

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>,
	Nicolas Pitre <nico@fluxnic.net>,
	"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
	Russell King <linux@armlinux.org.uk>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"list@263.net:IOMMU DRIVERS <iommu@lists.linux-foundation.org>,
	Joerg Roedel <joro@8bytes.org>,
	" <iommu@lists.linux-foundation.org>,
	Ben Dooks <ben-linux@fluff.org>,
	linux-omap <linux-omap@vger.kernel.org>,
	Christoph Hellwig <hch@lst.de>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: remove block layer bounce buffering for MMC v2
Date: Fri, 8 Mar 2019 10:18:53 +0100	[thread overview]
Message-ID: <20190308091853.GA14021@lst.de> (raw)
In-Reply-To: <CAPDyKFr6gDYttazFJJzyFm04qiy=9oQAeW9a-cFxHE1vP+DhLA@mail.gmail.com>

On Mon, Feb 25, 2019 at 02:54:13PM +0100, Ulf Hansson wrote:
> This looks good to me, however the lack of feedback/tests worries me a
> bit. So, unless you think it's a bad idea, I intend to apply this when
> v5.1 rc1 is out, which allows a lengthy test period in linux-next.

Please don't rush to merge this.  Based on a talk to some folks I
have an idea for a sg iterator that can hide the kmapping from
the drivers, which should allow for some less scary driver code and
clean this up a bit further.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Christoph Hellwig <hch@lst.de>,
	Russell King <linux@armlinux.org.uk>,
	Nicolas Pitre <nico@fluxnic.net>,
	Aaro Koskinen <aaro.koskinen@iki.fi>,
	Ben Dooks <ben-linux@fluff.org>,
	"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	linux-omap <linux-omap@vger.kernel.org>,
	"list@263.net:IOMMU DRIVERS <iommu@lists.linux-foundation.org>,
	Joerg Roedel <joro@8bytes.org>,"
	<iommu@lists.linux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: remove block layer bounce buffering for MMC v2
Date: Fri, 8 Mar 2019 10:18:53 +0100	[thread overview]
Message-ID: <20190308091853.GA14021@lst.de> (raw)
In-Reply-To: <CAPDyKFr6gDYttazFJJzyFm04qiy=9oQAeW9a-cFxHE1vP+DhLA@mail.gmail.com>

On Mon, Feb 25, 2019 at 02:54:13PM +0100, Ulf Hansson wrote:
> This looks good to me, however the lack of feedback/tests worries me a
> bit. So, unless you think it's a bad idea, I intend to apply this when
> v5.1 rc1 is out, which allows a lengthy test period in linux-next.

Please don't rush to merge this.  Based on a talk to some folks I
have an idea for a sg iterator that can hide the kmapping from
the drivers, which should allow for some less scary driver code and
clean this up a bit further.

  parent reply	other threads:[~2019-03-08  9:18 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-12  7:25 remove block layer bounce buffering for MMC v2 Christoph Hellwig
2019-02-12  7:25 ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 01/14] scatterlist: add sg_kmap_atomic / sg_kunmap_atomic helpers Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 02/14] mmc: remove the unused use_blk_mq field from struct mmc_host Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 03/14] mmc: add a need_kmap flag to " Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 04/14] mmc: davinci: handle highmem pages Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 05/14] mmc: moxart: " Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 06/14] mmc: omap: " Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12 18:39   ` Tony Lindgren
2019-02-12 18:39     ` Tony Lindgren
2019-02-12  7:25 ` [PATCH 07/14] mmc: omap: handle chained sglists Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 08/14] mmc: s3cmci: handle highmem pages Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 09/14] mmc: s3cmci: handle chained sglists Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 10/14] mmc: mvsdio: handle highmem pages Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 11/14] mmc: sh_mmcif: " Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 12/14] mmc: sh_mmcif: handle chained sglists Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 13/14] mmc: core: don't use block layer bounce buffers Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-12  7:25 ` [PATCH 14/14] dma-mapping: remove dma_max_pfn Christoph Hellwig
2019-02-12  7:25   ` Christoph Hellwig
2019-02-25 13:54 ` remove block layer bounce buffering for MMC v2 Ulf Hansson
2019-02-25 13:54   ` Ulf Hansson
     [not found]   ` <CAPDyKFr6gDYttazFJJzyFm04qiy=9oQAeW9a-cFxHE1vP+DhLA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-03-08  9:18     ` Christoph Hellwig [this message]
2019-03-08  9:18       ` Christoph Hellwig
2019-03-08  9:18       ` Christoph Hellwig
2019-03-08  9:43       ` Ulf Hansson
2019-03-08  9:43         ` Ulf Hansson

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