lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 28 Nov 2012 17:38:44 +0900 From: Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: Michal Hocko <mhocko@...e.cz> CC: linux-mm@...ck.org, linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>, Ying Han <yinghan@...gle.com>, Tejun Heo <htejun@...il.com>, Glauber Costa <glommer@...allels.com>, Li Zefan <lizefan@...wei.com> Subject: Re: [patch v2 2/6] memcg: keep prev's css alive for the whole mem_cgroup_iter (2012/11/27 3:47), Michal Hocko wrote: > css reference counting keeps the cgroup alive even though it has been > already removed. mem_cgroup_iter relies on this fact and takes a > reference to the returned group. The reference is then released on the > next iteration or mem_cgroup_iter_break. > mem_cgroup_iter currently releases the reference right after it gets the > last css_id. > This is correct because neither prev's memcg nor cgroup are accessed > after then. This will change in the next patch so we need to hold the > group alive a bit longer so let's move the css_put at the end of the > function. > > Signed-off-by: Michal Hocko <mhocko@...e.cz> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists