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sock: Ignore memcg pressure heuristics when raising allocated
Before sockets became aware of net-memcg's memory pressure since commit e1aab16 ("socket: initial cgroup code."), the memory usage would be granted to raise if below average even when under protocol's pressure. This provides fairness among the sockets of same protocol. That commit changes this because the heuristic will also be effective when only memcg is under pressure which makes no sense. So revert that behavior. After reverting, __sk_mem_raise_allocated() no longer considers memcg's pressure. As memcgs are isolated from each other w.r.t. memory accounting, consuming one's budget won't affect others. So except the places where buffer sizes are needed to be tuned, allow workloads to use the memory they are provisioned. Signed-off-by: Abel Wu <wuyun.abel@bytedance.com> Acked-by: Shakeel Butt <shakeelb@google.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20231019120026.42215-3-wuyun.abel@bytedance.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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