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However, we should bother these cpus as less as possible. The IPI1 were raised by flush_icache_range in bpf_int_jit_compile(). Futher, the calling of it was introduced in 3b8c9f1cdfc5("arm64: IPI each CPU after invalidating the I-cache for kernel mappings"), then I found the bpf case seems no need this operation. But I'm not sure, and still learning the JIT codes meanwhile. If I am wrong, please fix me, many thanks! Yanfei Xu (1): bpf: avoid unnecessary IPI in bpf_flush_icache arch/arm64/net/bpf_jit_comp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)