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libct/cg: retry opening a cgroup file #4442

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libct/cg: retry opening a cgroup file #4442

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Commits on Oct 21, 2024

  1. libct/cg: retry opening a cgroup file 

    From time to time we see unexpected errors (ENODEV or ENOENT) trying to
write to a cgroup file. This is probably due to some races in the
kernel.

Let's implement a retry when we see ENOENT or ENODEV, but only if a
directory exists.

Note this can have a negative effect on performance when some cgroup
features are disabled.

Signed-off-by: Kir Kolyshkin <[email protected]>
    @kolyshkin
    kolyshkin committed Oct 21, 2024
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