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| From | Mark Brown <broonie@kernel.org> |
| Newsgroups | linux.kernel |
| Subject | Re: Lockdep warning when using REGCACHE_RBTREE |
| Date | Fri, 15 Jan 2016 17:30:03 +0100 |
| Message-ID | <qRfqb-cf-41@gated-at.bofh.it> (permalink) |
| References | <qQYIG-5f6-19@gated-at.bofh.it> <qR07M-6ou-9@gated-at.bofh.it> <qR1dw-76Q-7@gated-at.bofh.it> |
| X-Original-To | Stefan Agner <stefan@agner.ch> |
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| X-Original-Cc | festevam@gmail.com, peterz@infradead.org, mingo@redhat.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org |
| X-Original-Date | Fri, 15 Jan 2016 16:28:32 +0000 |
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On Thu, Jan 14, 2016 at 05:14:47PM -0800, Stefan Agner wrote: > On a slightly other topic, I question whether REGCACHE_RBTREE is the > right cache type for the DCU DRM driver. The driver has uses a regmap > area of 1144 32-bit registers, the most space is used by the layer > configuration registers which are 0x40 apart and 0x0-0x20 for each layer > are actually used (hence somewhat above 50%). > Would FLAT be the better cache type? Yes, and if it's a MMIO device the performance of a flat cache is more in line with the device performance.
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Lockdep warning when using REGCACHE_RBTREE Stefan Agner <stefan@agner.ch> - 2016-01-14 23:40 +0100
Re: Lockdep warning when using REGCACHE_RBTREE Mark Brown <broonie@kernel.org> - 2016-01-15 01:10 +0100
Re: Lockdep warning when using REGCACHE_RBTREE Stefan Agner <stefan@agner.ch> - 2016-01-15 02:20 +0100
Re: Lockdep warning when using REGCACHE_RBTREE Mark Brown <broonie@kernel.org> - 2016-01-15 17:30 +0100
Re: Lockdep warning when using REGCACHE_RBTREE Stefan Agner <stefan@agner.ch> - 2016-01-15 20:20 +0100
Re: Lockdep warning when using REGCACHE_RBTREE Peter Zijlstra <peterz@infradead.org> - 2016-01-15 10:50 +0100
Re: Lockdep warning when using REGCACHE_RBTREE Mark Brown <broonie@kernel.org> - 2016-01-15 13:00 +0100
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