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Date: Tue, 10 Feb 2015 19:47:12 +0100 From: Jiri Slaby <jslaby@...e.cz> To: Josh Poimboeuf <jpoimboe@...hat.com>, Seth Jennings <sjenning@...hat.com>, Jiri Kosina <jkosina@...e.cz>, Vojtech Pavlik <vojtech@...e.cz> CC: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>, live-patching@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [RFC PATCH 7/9] proc: add /proc/<pid>/universe to show livepatch status On 02/09/2015, 06:31 PM, Josh Poimboeuf wrote: > Expose the per-task klp_universe value so users can determine which > tasks are holding up completion of a patching operation. > > Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com> > --- > fs/proc/base.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/fs/proc/base.c b/fs/proc/base.c > index 3f3d7ae..b9fe6b5 100644 > --- a/fs/proc/base.c > +++ b/fs/proc/base.c > @@ -2528,6 +2528,14 @@ static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns, > return err; > } > > +#ifdef CONFIG_LIVEPATCH > +static int proc_pid_klp_universe(struct seq_file *m, struct pid_namespace *ns, > + struct pid *pid, struct task_struct *task) > +{ > + return seq_printf(m, "%d\n", task->klp_universe); > +} > +#endif /* CONFIG_LIVEPATCH */ > + > /* > * Thread groups > */ > @@ -2628,6 +2636,9 @@ static const struct pid_entry tgid_base_stuff[] = { > #ifdef CONFIG_CHECKPOINT_RESTORE > REG("timers", S_IRUGO, proc_timers_operations), > #endif > +#ifdef CONFIG_LIVEPATCH > + ONE("universe", S_IRUGO, proc_pid_klp_universe), I am not sure if this can be UGO or if it should be USR only instead. Leaving for discussion, but I incline to use USR to avoid *any* info leakage. > +#endif regards, -- js suse labs -- 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/
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