From: Shakeel Butt <shakeelb@google.com>
To: Waiman Long <longman@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Vlastimil Babka <vbabka@suse.cz>, Roman Gushchin <guro@fb.com>,
LKML <linux-kernel@vger.kernel.org>,
Cgroups <cgroups@vger.kernel.org>, Linux MM <linux-mm@kvack.org>
Subject: Re: [PATCH v4 3/3] mm: memcg/slab: Disable cache merging for KMALLOC_NORMAL caches
Date: Wed, 5 May 2021 13:39:23 -0700 [thread overview]
Message-ID: <CALvZod7MnE2WiyxqCpou4+wXmr_dMz3iHf-NnJ5tVZRfyH9Xcw@mail.gmail.com> (raw)
In-Reply-To: <20210505200610.13943-4-longman@redhat.com>
On Wed, May 5, 2021 at 1:06 PM Waiman Long <longman@redhat.com> wrote:
>
> The KMALLOC_NORMAL (kmalloc-<n>) caches are for unaccounted objects only
> when CONFIG_MEMCG_KMEM is enabled. To make sure that this condition
> remains true, we will have to prevent KMALOC_NORMAL caches to merge
> with other kmem caches. This is now done by setting its refcount to -1
> right after its creation.
>
> Suggested-by: Roman Gushchin <guro@fb.com>
> Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
WARNING: multiple messages have this Message-ID (diff)
From: Shakeel Butt <shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
To: Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
Michal Hocko <mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Vladimir Davydov
<vdavydov.dev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>,
Pekka Enberg <penberg-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Joonsoo Kim <iamjoonsoo.kim-Hm3cg6mZ9cc@public.gmane.org>,
Vlastimil Babka <vbabka-AlSwsSmVLrQ@public.gmane.org>,
Roman Gushchin <guro-b10kYP2dOMg@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Cgroups <cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux MM <linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>
Subject: Re: [PATCH v4 3/3] mm: memcg/slab: Disable cache merging for KMALLOC_NORMAL caches
Date: Wed, 5 May 2021 13:39:23 -0700 [thread overview]
Message-ID: <CALvZod7MnE2WiyxqCpou4+wXmr_dMz3iHf-NnJ5tVZRfyH9Xcw@mail.gmail.com> (raw)
In-Reply-To: <20210505200610.13943-4-longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Wed, May 5, 2021 at 1:06 PM Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>
> The KMALLOC_NORMAL (kmalloc-<n>) caches are for unaccounted objects only
> when CONFIG_MEMCG_KMEM is enabled. To make sure that this condition
> remains true, we will have to prevent KMALOC_NORMAL caches to merge
> with other kmem caches. This is now done by setting its refcount to -1
> right after its creation.
>
> Suggested-by: Roman Gushchin <guro-b10kYP2dOMg@public.gmane.org>
> Signed-off-by: Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Reviewed-by: Shakeel Butt <shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
next prev parent reply other threads:[~2021-05-05 20:39 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-05 20:06 [PATCH v4 0/3] mm: memcg/slab: Fix objcg pointer array handling problem Waiman Long
2021-05-05 20:06 ` [PATCH v4 1/3] mm: memcg/slab: Properly set up gfp flags for objcg pointer array Waiman Long
2021-05-05 20:35 ` Roman Gushchin
2021-05-05 20:35 ` Roman Gushchin
2021-05-06 15:37 ` Vlastimil Babka
2021-05-06 15:37 ` Vlastimil Babka
2021-05-05 20:06 ` [PATCH v4 2/3] mm: memcg/slab: Create a new set of kmalloc-cg-<n> caches Waiman Long
2021-05-05 20:06 ` Waiman Long
2021-05-05 20:37 ` Roman Gushchin
2021-05-05 20:37 ` Roman Gushchin
2021-05-05 21:41 ` Vlastimil Babka
2021-05-05 23:19 ` Waiman Long
2021-05-05 23:19 ` Waiman Long
2021-05-06 16:00 ` Vlastimil Babka
2021-05-06 16:00 ` Vlastimil Babka
2021-05-06 16:07 ` Shakeel Butt
2021-05-06 16:07 ` Shakeel Butt
2021-05-06 16:07 ` Shakeel Butt
2021-05-06 19:30 ` Roman Gushchin
2021-05-06 19:30 ` Roman Gushchin
2021-05-07 18:45 ` Waiman Long
2021-05-07 18:45 ` Waiman Long
2021-05-05 20:06 ` [PATCH v4 3/3] mm: memcg/slab: Disable cache merging for KMALLOC_NORMAL caches Waiman Long
2021-05-05 20:06 ` Waiman Long
2021-05-05 20:38 ` Roman Gushchin
2021-05-05 20:38 ` Roman Gushchin
2021-05-05 20:39 ` Shakeel Butt [this message]
2021-05-05 20:39 ` Shakeel Butt
2021-05-05 20:39 ` Shakeel Butt
2021-05-06 16:02 ` Vlastimil Babka
2021-05-06 16:02 ` Vlastimil Babka
2021-05-12 14:51 ` [PATCH v5 2/3] mm: memcg/slab: Create a new set of kmalloc-cg-<n> caches Waiman Long
2021-05-12 14:51 ` Waiman Long
2021-05-12 14:54 ` Waiman Long
2021-05-12 14:54 ` Waiman Long
2021-05-13 0:32 ` Andrew Morton
2021-05-13 0:32 ` Andrew Morton
2021-05-13 8:40 ` Vlastimil Babka
2021-05-13 8:40 ` Vlastimil Babka
2021-05-13 16:22 ` Waiman Long
2021-05-13 16:22 ` Waiman Long
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