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2183a5c8a0
Otherwise the lock is susceptible to ever-changing false-sharing due to unrelated changes. This in particular popped up here where an unrelated change improved performance: https://lore.kernel.org/oe-lkp/202511281306.51105b46-lkp@intel.com/ Stabilize it with an explicit annotation which also has a side effect of furher improving scalability: > in our oiginal report,284922f4c5has a 6.1% performance improvement comparing > to parent17d85f33a8. > we applied your patch directly upon284922f4c5. as below, now by > "284922f4c5 + your patch" > we observe a 12.8% performance improvements (still comparing to17d85f33a8). Note nothing was done for the other fields, so some fluctuation is still possible. Tested-by: kernel test robot <oliver.sang@intel.com> Signed-off-by: Mateusz Guzik <mjguzik@gmail.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Link: https://patch.msgid.link/20251203100122.291550-1-mjguzik@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>