linux-kernel - Re: [PATCH 4/8] PM: suspend

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Message-ID: <y2jd6200be21005041406j8f632e90l60941174b4f23c71@mail.gmail.com>
Date:	Tue, 4 May 2010 14:06:07 -0700
From:	Arve Hjønnevåg <arve@...roid.com>
To:	Andi Kleen <andi@...obates.de>
Cc:	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Len Brown <len.brown@...el.com>,
	Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH 4/8] PM: suspend_block: Add debugfs file

2010/5/4 Andi Kleen <andi@...obates.de>:
> Arve Hjønnevåg <arve@...roid.com> writes:
>>
>> +static int suspend_blocker_stats_show(struct seq_file *m, void *unused)
>> +{
>> +     unsigned long irqflags;
>> +     struct suspend_blocker *blocker;
>> +
>> +     seq_puts(m, "name\tactive\n");
>> +     spin_lock_irqsave(&list_lock, irqflags);
>> +     list_for_each_entry(blocker, &inactive_blockers, link)
>> +             seq_printf(m, "\"%s\"\t0\n", blocker->name);
>> +     list_for_each_entry(blocker, &active_blockers, link)
>> +             seq_printf(m, "\"%s\"\t1\n", blocker->name);
>> +     spin_unlock_irqrestore(&list_lock, irqflags);
>
> Could you report the pid here too?
>

Most of the suspend blockers are in the kernel, and does not have a pid.

> The name set by the application might be meaningless or duplicated.
>

Currently all the names set by android user-space are unique but the
pids are not. We can add columns, or extend the name of user space
suspend blockers in the ioctl interface, later if needed.

-- 
Arve Hjønnevåg
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