Re: [PATCH 3/9] [RFC] Add a back-pointer from struct cg_cgroup_linkto struct cgroup

From: Li Zefan
Date: Fri Jul 03 2009 - 03:06:23 EST


> +static int current_css_set_cg_links_read(struct cgroup *cont,
> + struct cftype *cft,
> + struct seq_file *seq)
> +{
> + struct cg_cgroup_link *link, *saved_link;
> + struct css_set *cg;

call for a newline

> + write_lock_irq(&css_set_lock);

can be read_lock(&css_set_lock);

> + task_lock(current);
> + cg = current->cgroups;
> + list_for_each_entry_safe(link, saved_link, &cg->cg_links,
> + cg_link_list) {
> + struct cgroup *c = link->cgrp;
> + const char *name;

call for a newline

> + rcu_read_lock();
> + if (c->dentry)
> + name = c->dentry->d_name.name;
> + else
> + name = "?";
> + seq_printf(seq, "Root %lu group %s\n",
> + c->root->subsys_bits, name);
> + rcu_read_unlock();
> + }
> + task_unlock(current);
> + write_unlock_irq(&css_set_lock);
> + return 0;
> +}
> +
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