From: Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
kay-tD+1rO4QERM@public.gmane.org,
greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org,
lennart-mdGvqq1h2p+GdvJs77BJ7Q@public.gmane.org,
daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH 4/4] cgroup: implement task_cgroup_path_from_hierarchy()
Date: Mon, 15 Apr 2013 11:43:15 +0800 [thread overview]
Message-ID: <516B7753.9060503@huawei.com> (raw)
In-Reply-To: <1365964619-14762-5-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> +int task_cgroup_path_from_hierarchy(struct task_struct *task, int hierarchy_id,
> + char *buf, size_t buflen)
> +{
> + struct cgroupfs_root *root;
> + struct cgroup *cgrp = NULL;
> + int ret = -ENOENT;
> +
> + mutex_lock(&cgroup_mutex);
> +
> + root = idr_find(&cgroup_hierarchy_idr, hierarchy_id);
> + if (root) {
> + cgrp = task_cgroup_from_root(task, root);
task_cgroup_from_root() will never return NULL, and there's a BUG_ON(!res) in it.
> + if (cgrp)
> + ret = cgroup_path(cgrp, buf, buflen);
> + }
> +
> + mutex_unlock(&cgroup_mutex);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(task_cgroup_path_from_hierarchy);
WARNING: multiple messages have this Message-ID (diff)
From: Li Zefan <lizefan@huawei.com>
To: Tejun Heo <tj@kernel.org>
Cc: <containers@lists.linux-foundation.org>,
<cgroups@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<kay@vrfy.org>, <greg@kroah.com>, <lennart@poettering.net>,
<daniel@zonque.org>
Subject: Re: [PATCH 4/4] cgroup: implement task_cgroup_path_from_hierarchy()
Date: Mon, 15 Apr 2013 11:43:15 +0800 [thread overview]
Message-ID: <516B7753.9060503@huawei.com> (raw)
In-Reply-To: <1365964619-14762-5-git-send-email-tj@kernel.org>
> +int task_cgroup_path_from_hierarchy(struct task_struct *task, int hierarchy_id,
> + char *buf, size_t buflen)
> +{
> + struct cgroupfs_root *root;
> + struct cgroup *cgrp = NULL;
> + int ret = -ENOENT;
> +
> + mutex_lock(&cgroup_mutex);
> +
> + root = idr_find(&cgroup_hierarchy_idr, hierarchy_id);
> + if (root) {
> + cgrp = task_cgroup_from_root(task, root);
task_cgroup_from_root() will never return NULL, and there's a BUG_ON(!res) in it.
> + if (cgrp)
> + ret = cgroup_path(cgrp, buf, buflen);
> + }
> +
> + mutex_unlock(&cgroup_mutex);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(task_cgroup_path_from_hierarchy);
next prev parent reply other threads:[~2013-04-15 3:43 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-14 18:36 [PATCHSET] cgroup: implement task_cgroup_path_from_hierarchy() Tejun Heo
2013-04-14 18:36 ` Tejun Heo
[not found] ` <1365964619-14762-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2013-04-14 18:36 ` [PATCH 1/4] cgroup: refactor hierarchy_id handling Tejun Heo
2013-04-14 18:36 ` Tejun Heo
2013-04-14 18:36 ` [PATCH 2/4] cgroup: drop hierarchy_id_lock Tejun Heo
2013-04-14 18:36 ` Tejun Heo
2013-04-14 18:36 ` [PATCH 3/4] cgroup: make hierarchy_id use cyclic idr Tejun Heo
2013-04-14 18:36 ` Tejun Heo
2013-04-14 18:36 ` [PATCH 4/4] cgroup: implement task_cgroup_path_from_hierarchy() Tejun Heo
2013-04-15 3:22 ` [PATCHSET] " Tejun Heo
2013-04-15 3:22 ` Tejun Heo
2013-04-15 3:22 ` Tejun Heo
2013-04-15 3:43 ` Li Zefan
2013-04-15 3:43 ` Li Zefan
2013-05-14 18:45 ` Tejun Heo
2013-05-14 18:45 ` Tejun Heo
2013-04-14 18:36 ` [PATCH 4/4] " Tejun Heo
[not found] ` <1365964619-14762-5-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2013-04-14 19:16 ` Greg KH
2013-04-14 19:16 ` Greg KH
2013-04-15 3:43 ` Li Zefan [this message]
2013-04-15 3:43 ` Li Zefan
[not found] ` <516B7753.9060503-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-04-15 3:46 ` Tejun Heo
2013-04-15 3:46 ` Tejun Heo
[not found] ` <20130415034613.GK3050-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2013-04-15 3:48 ` Tejun Heo
2013-04-15 3:48 ` Tejun Heo
2013-04-15 3:48 ` Tejun Heo
2013-04-15 3:49 ` Li Zefan
2013-04-15 3:49 ` Li Zefan
[not found] ` <516B78E5.6000109-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-04-15 3:57 ` Tejun Heo
2013-04-15 3:57 ` Tejun Heo
2013-04-15 3:57 ` Tejun Heo
2013-04-15 3:43 ` Li Zefan
2013-04-15 3:50 ` [PATCH UPDATED " Tejun Heo
2013-04-15 3:50 ` Tejun Heo
2013-04-15 3:50 ` Tejun Heo
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