x86: Put hot per CPU variables into a struct

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The layout of per-cpu variables is at the mercy of the compiler. This
can lead to random performance fluctuations from build to build.

Create a structure to hold some of the hottest per-cpu variables,
starting with current_task.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111145.179707194@infradead.org

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Thomas Gleixner 2022-09-15 13:11:01 +02:00 • committed by Peter Zijlstra

parent fdc9ee7e97

commit e57ef2ed97

5 changed files with 24 additions and 15 deletions

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19

arch/x86/include/asm/current.h

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14

arch/x86/kernel/cpu/common.c

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2

arch/x86/kernel/process_32.c

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2

arch/x86/kernel/process_64.c

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2

arch/x86/kernel/smpboot.c

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