From: rric@kernel.org (Robert Richter)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/4] arm64, thunder: Add Kconfig option for Cavium Thunder SoC Family
Date: Fri, 5 Sep 2014 11:21:35 +0200 [thread overview]
Message-ID: <20140905092135.GR4703@rric.localhost> (raw)
In-Reply-To: <20140905083932.GD13515@arm.com>
On 05.09.14 09:39:32, Will Deacon wrote:
> On Fri, Sep 05, 2014 at 08:46:42AM +0100, Robert Richter wrote:
> > From: Radha Mohan Chintakuntla <rchintakuntla@cavium.com>
> >
> > Increase maximum numbers of cpus to 32. This relates to current
> > maximal possible cpu number. Increasing this to 64 cpus will be a
> > separate patch not part of this enablement patches.
>
> Just out of interest, does raising the current maximum limit actually break
> any existing code? If not, then doing this as two patches doesn't seem worth
> it.
Increasing to 64 should be fine from the perspective of cpu mask
implementation. Memory foot print should be the same already as this
uses long which is 64 bit. So this wouldn't hurt.
However, I felt a bit uncomfortable having a dependency here to
enabling 64 cpus and getting this patch set upstream. Support for more
than 32 cpus is not well tested yet and there still might be problems
with e.g. interrupt delivery or topology.
If increasing to 32 cpus as an intermediate step isn't the best
approach here, we can live with the current defaults too. I would then
just remove that change from the patch.
For follow on driver patch sets it would be good to have ARCH_THUNDER
upstream as this option will be shared between all drivers.
-Robert
next prev parent reply other threads:[~2014-09-05 9:21 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-05 7:46 [PATCH v2 0/4] arm64, thunder: Enable Cavium Thunder SoC Family Robert Richter
2014-09-05 7:46 ` [PATCH v2 1/4] arm64, thunder: Add Kconfig option for " Robert Richter
2014-09-05 8:39 ` Will Deacon
2014-09-05 9:21 ` Robert Richter [this message]
2014-09-05 9:25 ` Will Deacon
2014-09-05 9:36 ` Mark Rutland
2014-09-05 10:51 ` Robert Richter
2014-09-05 9:32 ` Russell King - ARM Linux
2014-09-05 10:45 ` Robert Richter
2014-09-05 11:05 ` Russell King - ARM Linux
2014-09-05 12:51 ` Mark Rutland
2014-09-05 14:04 ` Arnd Bergmann
2014-09-05 14:22 ` Mark Rutland
2014-09-05 16:25 ` Arnd Bergmann
2014-09-08 11:01 ` Robert Richter
2014-09-08 12:29 ` Arnd Bergmann
2014-09-08 18:25 ` Rob Herring
2014-09-05 7:46 ` [PATCH v2 2/4] arm64, thunder: Add initial dts for Cavium Thunder SoC Robert Richter
2014-09-05 11:21 ` Arnd Bergmann
2014-09-11 14:51 ` Robert Richter
2014-09-05 7:46 ` [PATCH v2 3/4] arm64, thunder: Document devicetree bindings " Robert Richter
2014-09-05 8:42 ` Will Deacon
2014-09-05 9:32 ` Robert Richter
2014-09-05 9:39 ` Mark Rutland
2014-09-08 7:54 ` Robert Richter
2014-09-05 7:46 ` [PATCH v2 4/4] arm64, defconfig: Enable Cavium Thunder SoC in defconfig Robert Richter
2014-09-05 8:42 ` [PATCH v2 0/4] arm64, thunder: Enable Cavium Thunder SoC Family Will Deacon
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