x86/percpu: Move pcpu_hot to percpu hot section

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Also change the alignment of the percpu hot section:

 -       PERCPU_SECTION(INTERNODE_CACHE_BYTES)
 +       PERCPU_SECTION(L1_CACHE_BYTES)

As vSMP will muck with INTERNODE_CACHE_BYTES that invalidates the
too-large-section assert we do:

  ASSERT(__per_cpu_hot_end - __per_cpu_hot_start <= 64, "percpu cache hot section too large")

[ mingo: Added INTERNODE_CACHE_BYTES fix & explanation. ]

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250303165246.2175811-3-brgerst@gmail.com

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Brian Gerst 2025-03-03 11:52:37 -05:00 • committed by Ingo Molnar

parent ab2bb9c084

commit 972f9cdff9

3 changed files with 16 additions and 19 deletions

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28

arch/x86/include/asm/current.h

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2

arch/x86/kernel/cpu/common.c

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5

arch/x86/kernel/vmlinux.lds.S

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