On Mon, Feb 23, 2015 at 01:00:09PM -0800, Andrew Morton wrote: > On Fri, 6 Feb 2015 18:45:49 +0800 Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx> wrote: > > > If some issues occurred inside a container guest, host user > > could not know which process is in trouble just by guest pid: > > the users of container guest only knew the pid inside containers. > > This will bring obstacle for trouble shooting. > > > > This patch adds four fields: NStgid, NSpid, NSpgid and NSsid: > > a) In init_pid_ns, nothing changed; > > > > b) In one pidns, will tell the pid inside containers: > > NStgid: 21776 5 1 > > NSpid: 21776 5 1 > > NSpgid: 21776 5 1 > > NSsid: 21729 1 0 > > ** Process id is 21776 in level 0, 5 in level 1, 1 in level 2. > > > > c) If pidns is nested, it depends on which pidns are you in. > > NStgid: 5 1 > > NSpid: 5 1 > > NSpgid: 5 1 > > NSsid: 1 0 > > ** Views from level 1 > > > > ... > > > > --- a/fs/proc/array.c > > +++ b/fs/proc/array.c > > @@ -208,6 +208,22 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns, > > from_kgid_munged(user_ns, GROUP_AT(group_info, g))); > > put_cred(cred); > > > > + seq_puts(m, "\nNStgid:"); > > + for (g = ns->level; g <= pid->level; g++) > > + seq_printf(m, "\t%d", > > + task_tgid_nr_ns(p, pid->numbers[g].ns)); > > + seq_puts(m, "\nNSpid:"); > > + for (g = ns->level; g <= pid->level; g++) > > + seq_printf(m, "\t%d", > > + task_pid_nr_ns(p, pid->numbers[g].ns)); > > + seq_puts(m, "\nNSpgid:"); > > + for (g = ns->level; g <= pid->level; g++) > > + seq_printf(m, "\t%d", > > + task_pgrp_nr_ns(p, pid->numbers[g].ns)); > > + seq_puts(m, "\nNSsid:"); > > + for (g = ns->level; g <= pid->level; g++) > > + seq_printf(m, "\t%d", > > + task_session_nr_ns(p, pid->numbers[g].ns)); > > seq_putc(m, '\n'); > > } > > Is there any point in including this code if CONFIG_USER_NS=n? Not if CONFIG_PID_NS=n, no -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
