mm: vmpressure: don't count proactive reclaim in vmpressure

mm: vmpressure: don't count proactive reclaim in vmpressure

vmpressure is used in cgroup v1 to notify userspace of reclaim efficiency
events, and is also used in both cgroup v1 and v2 as a signal for memory
pressure for networking, see mem_cgroup_under_socket_pressure().

Proactive reclaim intends to probe memcgs for cold memory, without
affecting their performance.  Hence, reclaim caused by writing to
memory.reclaim should not trigger vmpressure.

Link: https://lkml.kernel.org/r/20220714064918.2576464-1-yosryahmed@google.com
Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
Acked-by: Shakeel Butt <shakeelb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: David Hildenbrand <david@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: NeilBrown <neilb@suse.de>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>