From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Douglas Anderson <dianders@chromium.org>
Cc: Robin Murphy <robin.murphy@arm.com>,
Tomasz Figa <tfiga@chromium.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Pawel Osciak <pawel@osciak.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
corbet@lwn.net, akpm@linux-foundation.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 2/3] common: DMA-mapping: add DMA_ATTR_NOHUGEPAGE attribute
Date: Fri, 8 Jan 2016 13:35:45 +0000 [thread overview]
Message-ID: <20160108133545.GK19062@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1452213405-22942-3-git-send-email-dianders@chromium.org>
On Thu, Jan 07, 2016 at 04:36:44PM -0800, Douglas Anderson wrote:
> This patch adds the DMA_ATTR_NOHUGEPAGE attribute to the DMA-mapping
> subsystem.
It would be nicer to keep things in the positive-logic sense if at all
possible: flags that indicate "we don't want something" tend to end up
with double or triple negatives somewhere which makes understanding
the code much harder. It's a shame we have MADV_NOHUGEPAGE...
That's not a strong view, but a preference.
--
RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2016-01-08 13:36 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-08 0:36 [PATCH v4 0/3] dma-mapping: Patches for speeding up allocation Douglas Anderson
2016-01-08 0:36 ` [PATCH v4 1/3] ARM: dma-mapping: Optimize allocation Douglas Anderson
2016-01-08 0:36 ` [PATCH v4 2/3] common: DMA-mapping: add DMA_ATTR_NOHUGEPAGE attribute Douglas Anderson
2016-01-08 13:10 ` Robin Murphy
2016-01-08 23:04 ` Doug Anderson
2016-01-08 13:35 ` Russell King - ARM Linux [this message]
2016-01-08 23:05 ` Doug Anderson
2016-01-08 23:18 ` Russell King - ARM Linux
2016-01-08 23:31 ` Doug Anderson
2016-01-09 7:55 ` Christoph Hellwig
2016-01-09 16:24 ` Tomasz Figa
2016-01-08 13:42 ` Christoph Hellwig
2016-01-08 23:05 ` Doug Anderson
2016-01-09 7:54 ` Christoph Hellwig
2016-01-08 0:36 ` [PATCH v4 3/3] ARM: dma-mapping: Use DMA_ATTR_NOHUGEPAGE hint to optimize allocation Douglas Anderson
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