Messages in this thread Patch in this message | | | Date | Tue, 02 Mar 2021 09:54:46 -0000 | From | "tip-bot2 for Ingo Molnar" <> | Subject | [tip: x86/mm] smp: Micro-optimize smp_call_function_many_cond() |
| |
The following commit has been merged into the x86/mm branch of tip:
Commit-ID: dd75cba56151cb3b9dc7eac0221c9b1967f6ddb5 Gitweb: https://git.kernel.org/tip/dd75cba56151cb3b9dc7eac0221c9b1967f6ddb5 Author: Ingo Molnar <mingo@kernel.org> AuthorDate: Tue, 02 Mar 2021 08:02:43 +01:00 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Tue, 02 Mar 2021 09:09:59 +01:00
smp: Micro-optimize smp_call_function_many_cond()
Call the generic send_call_function_single_ipi() function, which will avoid the IPI when @last_cpu is idle.
Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/smp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/smp.c b/kernel/smp.c index b6375d7..af0d51d 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -694,7 +694,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask, * provided mask. */ if (nr_cpus == 1) - arch_send_call_function_single_ipi(last_cpu); + send_call_function_single_ipi(last_cpu); else if (likely(nr_cpus > 1)) arch_send_call_function_ipi_mask(cfd->cpumask_ipi); }
| |