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61e98ebff3
I see quite a lot of static branch mispredictions on a simple web serving workload. The issue is in __atomic_add_unless(), called from _atomic_dec_and_lock(). There is no obvious common case, so it is better to let the hardware predict the branch. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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uapi/asm |