From: Kent Overstreet <koverstreet@google.com>
To: Tejun Heo <tj@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>,
containers@lists.linux-foundation.org,
Cgroups <cgroups@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
Christoph Lameter <cl@linux-foundation.org>
Subject: Re: [PATCH 04/11] cgroup: use kzalloc() and list_del_init()
Date: Wed, 12 Jun 2013 19:52:02 -0700 [thread overview]
Message-ID: <20130613025202.GD10979@localhost> (raw)
In-Reply-To: <20130613024859.GA7432@mtj.dyndns.org>
On Wed, Jun 12, 2013 at 07:48:59PM -0700, Tejun Heo wrote:
> On Wed, Jun 12, 2013 at 07:43:10PM -0700, Kent Overstreet wrote:
> > list_del() does do poisoning - and list debugging is cheaper to enable
> > than full slab debugging.
>
> Ah, right, now we have DEBUG_LIST. Completely forgot about that. I
> don't think the cost difference matters that much as long as there are
> enough people running with slab debugging, but, yeah, with DEBUG_LIST,
> leaving list_del() alone would actually be better. I'll drop that
> part.
I can't remember if it was Fedora or RH (or both?) but in one of those
they actually leave it enabled in their production kernels. Someone was
blogging about the bugs it found...
next prev parent reply other threads:[~2013-06-13 2:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-12 21:03 [PATCHSET cgroup/for-3.11] cgroup: convert cgroup_subsys_state refcnt to percpu_ref Tejun Heo
2013-06-12 21:03 ` [PATCH 01/11] cgroup: remove now unused css_depth() Tejun Heo
2013-06-12 21:03 ` [PATCH 02/11] cgroup: consistently use @cset for struct css_set variables Tejun Heo
2013-06-12 21:03 ` [PATCH 03/11] cgroup: bring some sanity to naming around cg_cgroup_link Tejun Heo
2013-06-13 2:34 ` Li Zefan
2013-06-12 21:03 ` [PATCH 04/11] cgroup: use kzalloc() and list_del_init() Tejun Heo
2013-06-13 2:36 ` Li Zefan
2013-06-13 2:38 ` Kent Overstreet
2013-06-13 2:41 ` Tejun Heo
2013-06-13 2:43 ` Kent Overstreet
2013-06-13 2:48 ` Tejun Heo
2013-06-13 2:52 ` Kent Overstreet [this message]
2013-06-13 2:56 ` Tejun Heo
2013-06-13 3:05 ` Tejun Heo
2013-06-13 3:13 ` Li Zefan
2013-06-13 2:39 ` Tejun Heo
2013-06-12 21:03 ` [PATCH 05/11] cgroup: clean up css_[try]get() and css_put() Tejun Heo
2013-06-13 2:38 ` Li Zefan
2013-06-12 21:03 ` [PATCH 06/11] cgroup: rename CGRP_REMOVED to CGRP_DEAD Tejun Heo
2013-06-12 21:03 ` [PATCH 07/11] cgroup: drop unnecessary RCU dancing from __put_css_set() Tejun Heo
2013-06-12 21:03 ` [PATCH 08/11] cgroup: remove cgroup->count and use Tejun Heo
2013-06-12 21:03 ` [PATCH 09/11] cgroup: reorder the operations in cgroup_destroy_locked() Tejun Heo
2013-06-12 21:03 ` [PATCH 10/11] cgroup: split cgroup destruction into two steps Tejun Heo
2013-06-12 21:03 ` [PATCH 11/11] cgroup: use percpu refcnt for cgroup_subsys_states Tejun Heo
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