From: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
To: Michal Hocko <mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
vdavydov-5HdwGun5lf+gSpxsJD1C4w@public.gmane.org,
tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 5/8] mm: memcontrol: account socket memory on unified hierarchy
Date: Fri, 6 Nov 2015 12:45:17 -0500 [thread overview]
Message-ID: <20151106174517.GA9315@cmpxchg.org> (raw)
In-Reply-To: <20151106164657.GL4390-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
On Fri, Nov 06, 2015 at 05:46:57PM +0100, Michal Hocko wrote:
> The basic problem was that the Delegate feature has been backported to
> our systemd package without further consideration and that has
> invalidated a lot of performance testing because some resource
> controllers have measurable effects on those benchmarks.
You're talking about a userspace bug. No amount of fragmenting and
layering and opt-in in the kernel's runtime configuration space is
going to help you if you screw up and enable it all by accident.
> > All I read here is vague inflammatory language to spread FUD.
>
> I was merely pointing out that memory controller might be enabled without
> _user_ actually even noticing because the controller wasn't enabled
> explicitly. I haven't blamed anybody for that.
Why does that have anything to do with how we design our interface?
We can't do more than present a sane interface in good faith and lobby
userspace projects if we think they misuse it.
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: David Miller <davem@davemloft.net>,
akpm@linux-foundation.org, vdavydov@virtuozzo.com, tj@kernel.org,
netdev@vger.kernel.org, linux-mm@kvack.org,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/8] mm: memcontrol: account socket memory on unified hierarchy
Date: Fri, 6 Nov 2015 12:45:17 -0500 [thread overview]
Message-ID: <20151106174517.GA9315@cmpxchg.org> (raw)
In-Reply-To: <20151106164657.GL4390@dhcp22.suse.cz>
On Fri, Nov 06, 2015 at 05:46:57PM +0100, Michal Hocko wrote:
> The basic problem was that the Delegate feature has been backported to
> our systemd package without further consideration and that has
> invalidated a lot of performance testing because some resource
> controllers have measurable effects on those benchmarks.
You're talking about a userspace bug. No amount of fragmenting and
layering and opt-in in the kernel's runtime configuration space is
going to help you if you screw up and enable it all by accident.
> > All I read here is vague inflammatory language to spread FUD.
>
> I was merely pointing out that memory controller might be enabled without
> _user_ actually even noticing because the controller wasn't enabled
> explicitly. I haven't blamed anybody for that.
Why does that have anything to do with how we design our interface?
We can't do more than present a sane interface in good faith and lobby
userspace projects if we think they misuse it.
--
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WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: David Miller <davem@davemloft.net>,
akpm@linux-foundation.org, vdavydov@virtuozzo.com, tj@kernel.org,
netdev@vger.kernel.org, linux-mm@kvack.org,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/8] mm: memcontrol: account socket memory on unified hierarchy
Date: Fri, 6 Nov 2015 12:45:17 -0500 [thread overview]
Message-ID: <20151106174517.GA9315@cmpxchg.org> (raw)
In-Reply-To: <20151106164657.GL4390@dhcp22.suse.cz>
On Fri, Nov 06, 2015 at 05:46:57PM +0100, Michal Hocko wrote:
> The basic problem was that the Delegate feature has been backported to
> our systemd package without further consideration and that has
> invalidated a lot of performance testing because some resource
> controllers have measurable effects on those benchmarks.
You're talking about a userspace bug. No amount of fragmenting and
layering and opt-in in the kernel's runtime configuration space is
going to help you if you screw up and enable it all by accident.
> > All I read here is vague inflammatory language to spread FUD.
>
> I was merely pointing out that memory controller might be enabled without
> _user_ actually even noticing because the controller wasn't enabled
> explicitly. I haven't blamed anybody for that.
Why does that have anything to do with how we design our interface?
We can't do more than present a sane interface in good faith and lobby
userspace projects if we think they misuse it.
next prev parent reply other threads:[~2015-11-06 17:45 UTC|newest]
Thread overview: 156+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-22 4:21 [PATCH 0/8] mm: memcontrol: account socket memory in unified hierarchy Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-22 4:21 ` [PATCH 1/8] mm: page_counter: let page_counter_try_charge() return bool Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-23 11:31 ` Michal Hocko
2015-10-23 11:31 ` Michal Hocko
2015-10-22 4:21 ` [PATCH 2/8] mm: memcontrol: export root_mem_cgroup Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-23 11:32 ` Michal Hocko
2015-10-23 11:32 ` Michal Hocko
2015-10-22 4:21 ` [PATCH 3/8] net: consolidate memcg socket buffer tracking and accounting Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-22 18:46 ` Vladimir Davydov
2015-10-22 18:46 ` Vladimir Davydov
2015-10-22 18:46 ` Vladimir Davydov
2015-10-22 19:09 ` Johannes Weiner
2015-10-22 19:09 ` Johannes Weiner
2015-10-23 13:42 ` Vladimir Davydov
2015-10-23 13:42 ` Vladimir Davydov
2015-10-23 13:42 ` Vladimir Davydov
2015-10-23 12:38 ` Michal Hocko
2015-10-23 12:38 ` Michal Hocko
2015-10-22 4:21 ` [PATCH 4/8] mm: memcontrol: prepare for unified hierarchy socket accounting Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-23 12:39 ` Michal Hocko
2015-10-23 12:39 ` Michal Hocko
2015-10-22 4:21 ` [PATCH 5/8] mm: memcontrol: account socket memory on unified hierarchy Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-22 18:47 ` Vladimir Davydov
2015-10-22 18:47 ` Vladimir Davydov
2015-10-22 18:47 ` Vladimir Davydov
[not found] ` <1445487696-21545-6-git-send-email-hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2015-10-23 13:19 ` Michal Hocko
2015-10-23 13:19 ` Michal Hocko
2015-10-23 13:19 ` Michal Hocko
[not found] ` <20151023131956.GA15375-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-10-23 13:59 ` David Miller
2015-10-23 13:59 ` David Miller
2015-10-23 13:59 ` David Miller
2015-10-26 16:56 ` Johannes Weiner
2015-10-26 16:56 ` Johannes Weiner
2015-10-27 12:26 ` Michal Hocko
2015-10-27 12:26 ` Michal Hocko
[not found] ` <20151027122647.GG9891-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-10-27 13:49 ` David Miller
2015-10-27 13:49 ` David Miller
2015-10-27 13:49 ` David Miller
2015-10-27 15:41 ` Johannes Weiner
2015-10-27 15:41 ` Johannes Weiner
2015-10-27 15:41 ` Johannes Weiner
2015-10-27 16:15 ` Michal Hocko
2015-10-27 16:15 ` Michal Hocko
2015-10-27 16:42 ` Johannes Weiner
2015-10-27 16:42 ` Johannes Weiner
[not found] ` <20151027164227.GB7749-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2015-10-28 0:45 ` David Miller
2015-10-28 0:45 ` David Miller
2015-10-28 0:45 ` David Miller
2015-10-28 3:05 ` Johannes Weiner
2015-10-28 3:05 ` Johannes Weiner
2015-10-29 15:25 ` Michal Hocko
2015-10-29 15:25 ` Michal Hocko
[not found] ` <20151029152546.GG23598-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-10-29 16:10 ` Johannes Weiner
2015-10-29 16:10 ` Johannes Weiner
2015-10-29 16:10 ` Johannes Weiner
2015-11-04 10:42 ` Michal Hocko
2015-11-04 10:42 ` Michal Hocko
[not found] ` <20151104104239.GG29607-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-11-04 19:50 ` Johannes Weiner
2015-11-04 19:50 ` Johannes Weiner
2015-11-04 19:50 ` Johannes Weiner
2015-11-05 14:40 ` Michal Hocko
2015-11-05 14:40 ` Michal Hocko
2015-11-05 16:16 ` David Miller
2015-11-05 16:16 ` David Miller
[not found] ` <20151105.111609.1695015438589063316.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2015-11-05 16:28 ` Michal Hocko
2015-11-05 16:28 ` Michal Hocko
2015-11-05 16:28 ` Michal Hocko
2015-11-05 16:30 ` David Miller
2015-11-05 16:30 ` David Miller
[not found] ` <20151105162803.GD15111-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-11-05 22:32 ` Johannes Weiner
2015-11-05 22:32 ` Johannes Weiner
2015-11-05 22:32 ` Johannes Weiner
2015-11-06 12:51 ` Michal Hocko
2015-11-06 12:51 ` Michal Hocko
2015-11-05 20:55 ` Johannes Weiner
2015-11-05 20:55 ` Johannes Weiner
[not found] ` <20151105205522.GA1067-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2015-11-05 22:52 ` Johannes Weiner
2015-11-05 22:52 ` Johannes Weiner
2015-11-05 22:52 ` Johannes Weiner
2015-11-06 10:57 ` Michal Hocko
2015-11-06 10:57 ` Michal Hocko
2015-11-06 16:19 ` Johannes Weiner
2015-11-06 16:19 ` Johannes Weiner
[not found] ` <20151106161953.GA7813-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2015-11-06 16:46 ` Michal Hocko
2015-11-06 16:46 ` Michal Hocko
2015-11-06 16:46 ` Michal Hocko
[not found] ` <20151106164657.GL4390-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-11-06 17:45 ` Johannes Weiner [this message]
2015-11-06 17:45 ` Johannes Weiner
2015-11-06 17:45 ` Johannes Weiner
2015-11-07 3:45 ` David Miller
2015-11-07 3:45 ` David Miller
2015-11-12 18:36 ` Mel Gorman
2015-11-12 18:36 ` Mel Gorman
2015-11-12 18:36 ` Mel Gorman
2015-11-12 19:12 ` Johannes Weiner
2015-11-12 19:12 ` Johannes Weiner
2015-11-06 9:05 ` Vladimir Davydov
2015-11-06 9:05 ` Vladimir Davydov
2015-11-06 9:05 ` Vladimir Davydov
2015-11-06 9:05 ` Vladimir Davydov
2015-11-06 13:29 ` Michal Hocko
2015-11-06 13:29 ` Michal Hocko
2015-11-06 16:35 ` Johannes Weiner
2015-11-06 16:35 ` Johannes Weiner
2015-11-06 13:21 ` Michal Hocko
2015-11-06 13:21 ` Michal Hocko
2015-10-22 4:21 ` [PATCH 6/8] mm: vmscan: simplify memcg vs. global shrinker invocation Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-23 13:26 ` Michal Hocko
2015-10-23 13:26 ` Michal Hocko
2015-10-22 4:21 ` [PATCH 7/8] mm: vmscan: report vmpressure at the level of reclaim activity Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
[not found] ` <1445487696-21545-8-git-send-email-hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2015-10-22 18:48 ` Vladimir Davydov
2015-10-22 18:48 ` Vladimir Davydov
2015-10-22 18:48 ` Vladimir Davydov
2015-10-22 18:48 ` Vladimir Davydov
2015-10-23 13:49 ` Michal Hocko
2015-10-23 13:49 ` Michal Hocko
2015-10-23 13:49 ` Michal Hocko
2015-10-22 4:21 ` [PATCH 8/8] mm: memcontrol: hook up vmpressure to socket pressure Johannes Weiner
2015-10-22 4:21 ` Johannes Weiner
2015-10-22 18:57 ` Vladimir Davydov
2015-10-22 18:57 ` Vladimir Davydov
2015-10-22 18:57 ` Vladimir Davydov
2015-10-22 18:45 ` [PATCH 0/8] mm: memcontrol: account socket memory in unified hierarchy Vladimir Davydov
2015-10-22 18:45 ` Vladimir Davydov
2015-10-22 18:45 ` Vladimir Davydov
2015-10-26 17:22 ` Johannes Weiner
2015-10-26 17:22 ` Johannes Weiner
2015-10-26 17:22 ` Johannes Weiner
2015-10-26 17:22 ` Johannes Weiner
2015-10-27 8:43 ` Vladimir Davydov
2015-10-27 8:43 ` Vladimir Davydov
2015-10-27 8:43 ` Vladimir Davydov
2015-10-27 16:01 ` Johannes Weiner
2015-10-27 16:01 ` Johannes Weiner
2015-10-28 8:20 ` Vladimir Davydov
2015-10-28 8:20 ` Vladimir Davydov
2015-10-28 8:20 ` Vladimir Davydov
2015-10-28 18:58 ` Johannes Weiner
2015-10-28 18:58 ` Johannes Weiner
2015-10-29 9:27 ` Vladimir Davydov
2015-10-29 9:27 ` Vladimir Davydov
2015-10-29 9:27 ` Vladimir Davydov
2015-10-29 17:52 ` Johannes Weiner
2015-10-29 17:52 ` Johannes Weiner
2015-10-29 17:52 ` Johannes Weiner
2015-11-02 14:47 ` Vladimir Davydov
2015-11-02 14:47 ` Vladimir Davydov
2015-11-02 14:47 ` Vladimir Davydov
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