linux-kernel - Re: [PATCH bpf-next v2] bpf: reparent bpf maps on memcg offlining

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Message-Id: <165766621306.6916.10461037448631832100.git-patchwork-notify@kernel.org>
Date:   Tue, 12 Jul 2022 22:50:13 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Roman Gushchin <roman.gushchin@...ux.dev>
Cc:     bpf@...r.kernel.org, shakeelb@...gle.com, ast@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next v2] bpf: reparent bpf maps on memcg offlining

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@...nel.org>:

On Mon, 11 Jul 2022 09:28:27 -0700 you wrote:
> The memory consumed by a mpf map is always accounted to the memory
> cgroup of the process which created the map. The map can outlive
> the memory cgroup if it's used by processes in other cgroups or
> is pinned on bpffs. In this case the map pins the original cgroup
> in the dying state.
> 
> For other types of objects (slab objects, non-slab kernel allocations,
> percpu objects and recently LRU pages) there is a reparenting process
> implemented: on cgroup offlining charged objects are getting
> reassigned to the parent cgroup. Because all charges and statistics
> are fully recursive it's a fairly cheap operation.
> 
> [...]

Here is the summary with links:
  - [bpf-next,v2] bpf: reparent bpf maps on memcg offlining
    https://git.kernel.org/bpf/bpf-next/c/cbddef2759b6

You are awesome, thank you!
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