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proc_fuse: add psi(pressure stall information) procfs #665

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proc_fuse: add psi(pressure stall information) procfs #665

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Commits on Nov 14, 2024

  1. proc_fuse: add psi(pressure stall information) procfs 

    Kernel support psi(pressure stall information) since 4.20
with procfs /proc/pressure/{io,cpu,memory} and
cgroupv2 {io.pressure, cpu.pressure, memory.pressure}.

This patch add read-only psi procfs,
and people can get pressure information now.
Full functional feature for monitoring are still under investigation.

Signed-off-by: Feng Sun <[email protected]>
    @loyou
    loyou committed Nov 14, 2024
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