From: Michal Hocko <mhocko@kernel.org>
To: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: David Hildenbrand <david@redhat.com>,
akpm@linux-foundation.org, hannes@cmpxchg.org,
shakeelb@google.com, vdavydov.dev@gmail.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] mm: Allocate shrinker_map on appropriate NUMA node
Date: Fri, 31 Jan 2020 16:47:35 +0100 [thread overview]
Message-ID: <20200131154735.GA4520@dhcp22.suse.cz> (raw)
In-Reply-To: <5f3fc9a9-9a22-ccc3-5971-9783b60807bc@virtuozzo.com>
On Fri 31-01-20 18:00:51, Kirill Tkhai wrote:
[...]
> @@ -333,8 +333,9 @@ static int memcg_expand_one_shrinker_map(struct mem_cgroup *memcg,
> /* Not yet online memcg */
> if (!old)
> return 0;
> -
> - new = kvmalloc(sizeof(*new) + size, GFP_KERNEL);
> + /* See comment in alloc_mem_cgroup_per_node_info()*/
> + tmp = node_state(nid, N_NORMAL_MEMORY) ? nid : NUMA_NO_NODE;
> + new = kvmalloc_node(sizeof(*new) + size, GFP_KERNEL, tmp);
> if (!new)
> return -ENOMEM;
I do not think this is a good pattern to copy. Why cannot you simply use
kvmalloc_node with the given node? The allocator should fallback to the
closest node if the given one doesn't have any memory.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2020-01-31 15:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-31 12:09 [PATCH] " Kirill Tkhai
2020-01-31 14:57 ` David Hildenbrand
2020-01-31 15:00 ` [PATCH v2] " Kirill Tkhai
2020-01-31 15:47 ` Michal Hocko [this message]
2020-01-31 15:49 ` Kirill Tkhai
2020-01-31 16:01 ` Michal Hocko
2020-01-31 16:08 ` [PATCH v3] " Kirill Tkhai
2020-01-31 16:18 ` Michal Hocko
2020-02-03 9:31 ` Kirill Tkhai
2020-01-31 16:20 ` David Hildenbrand
2020-01-31 17:22 ` Shakeel Butt
2020-01-31 22:37 ` Roman Gushchin
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