[Bug 84794] [snb] GTT go slow

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84794

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
The active ingredient is just

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b32ebf9..f4001e0 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2334,7 +2334,6 @@ config HAVE_ATOMIC_IOMAP

 config HAVE_TEXT_POKE_SMP
        bool
-       select STOP_MACHINE if SMP

 config X86_DEV_DMA_OPS
        bool

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