Re: [PATCH] kretprobe scalability improvement

[Matt Wu]

On 2021/7/4, 5:17 PM, "Christoph Hellwig" <hch@xxxxxxxxxxxxx> wrote:

    Would it make sense to just reuse kernel/bpf/percpu_freelist.c for
    kretprobes?

Thanks for the info. bpf/percpu_freelist does meet the requirements of kretprobe_instances management and is more compact in memory. But  the spinlock usage (through locally) looks a bit heavy since it must disable interrupts on local cpu.

I will perform a test to collect some data for comparison.

Regards,
Matt Wu