From: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
akpm@linux-foundation.org, mm-commits@vger.kernel.org,
liwanp@linux.vnet.ibm.com, Tejun Heo <htejun@gmail.com>,
Li Zefan <lizefan@huawei.com>,
cgroups mailinglist <cgroups@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: + hugetlb-cgroup-simplify-pre_destroy-callback.patch added to -mm tree
Date: Fri, 20 Jul 2012 17:08:10 +0900 [thread overview]
Message-ID: <500911EA.1030004@jp.fujitsu.com> (raw)
In-Reply-To: <20120720080136.GB12434@tiehlicka.suse.cz>
(2012/07/20 17:01), Michal Hocko wrote:
> On Fri 20-07-12 10:20:29, KAMEZAWA Hiroyuki wrote:
> [...]
>> Hmm, can't cgroup_lock() be implemented as
>>
>>
>> void cgroup_lock()
>> {
>> get_online_cpus()
>> lock_memory_hotplug()
>> mutex_lock(&cgroup_mutex);
>> }
>
> This is really ugly and it wouldn't help much anyway. Notifier which
> takes the cgroup_lock is called when cpu_hotplug.lock is held already.
Hm ? IIUC, notifer will not work until put_online_cpu() is called.
> You would need to call cgroup_lock() before taking the cpu_hotplug.lock
> and remove it from notifiers. I think this should be doable but I didn't
> have too much time to look deeper into it.
>
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-07-20 8:10 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120718212637.133475C0050@hpza9.eem.corp.google.com>
2012-07-19 11:39 ` Michal Hocko
2012-07-19 12:21 ` Aneesh Kumar K.V
2012-07-19 12:38 ` Michal Hocko
2012-07-19 13:48 ` Aneesh Kumar K.V
2012-07-19 14:09 ` [PATCH] cgroup: Don't drop the cgroup_mutex in cgroup_rmdir Aneesh Kumar K.V
2012-07-19 16:50 ` Tejun Heo
2012-07-20 15:45 ` Peter Zijlstra
2012-07-20 20:05 ` Tejun Heo
2012-07-20 22:07 ` Glauber Costa
2012-07-27 6:15 ` Li Zefan
2012-07-30 18:25 ` Tejun Heo
2012-07-20 7:51 ` Michal Hocko
2012-07-20 19:49 ` Tejun Heo
2012-07-20 1:05 ` + hugetlb-cgroup-simplify-pre_destroy-callback.patch added to -mm tree Kamezawa Hiroyuki
2012-07-20 1:20 ` Kamezawa Hiroyuki
2012-07-20 8:01 ` Michal Hocko
2012-07-20 8:08 ` Kamezawa Hiroyuki [this message]
2012-07-20 8:06 ` Michal Hocko
2012-07-20 19:18 ` Aneesh Kumar K.V
2012-07-20 19:56 ` Tejun Heo
2012-07-21 2:14 ` Kamezawa Hiroyuki
2012-07-21 2:46 ` Tejun Heo
2012-07-21 4:05 ` Kamezawa Hiroyuki
2012-07-22 17:34 ` Tejun Heo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=500911EA.1030004@jp.fujitsu.com \
--to=kamezawa.hiroyu@jp.fujitsu.com \
--cc=akpm@linux-foundation.org \
--cc=aneesh.kumar@linux.vnet.ibm.com \
--cc=cgroups@vger.kernel.org \
--cc=htejun@gmail.com \
--cc=linux-mm@kvack.org \
--cc=liwanp@linux.vnet.ibm.com \
--cc=lizefan@huawei.com \
--cc=mhocko@suse.cz \
--cc=mm-commits@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox