On 12/31/2015 12:20 PM, Eduardo Valentin wrote:
> On Thu, Dec 31, 2015 at 11:47:57AM -0600, Nishanth Menon wrote:
>> On 12/31/2015 11:29 AM, Eduardo Valentin wrote:
>>> can we have a shorter title?
>>>
>>>
>>> Orderly power off is supposed to take care of this. Looking at the code,
>>> it will force a shutdown in case execution of userland command fails:
>>>
>>> static int __orderly_poweroff(bool force)
>>> {
>>> int ret;
>>>
>>> ret = run_cmd(poweroff_cmd);
>>>
>>> if (ret && force) {
>>> pr_warn("Failed to start orderly shutdown: forcing the issue\n");
>>>
>>> /*
>>> * I guess this should try to kick off some daemon to sync and
>>> * poweroff asap. Or not even bother syncing if we're doing an
>>> * emergency shutdown?
>>> */
>>> emergency_sync();
>>> kernel_power_off();
>>> }
>>
>> Yes, it will *IF* userspace fails. the condition that I had tracked
>> was before identifying the following fix[1] - Example fail is here[2]
>>
>
> OK. But still, why other users of orderly_poweroff do not
> deserve to be fixed, then?
>
I'd agree as well.. I guess the comment from Robin Holt <holt@xxxxxxx>
anticipated something like this will eventually occur.
"* I guess this should try to kick off some daemon to sync and
* poweroff asap. Or not even bother syncing if we're doing an
* emergency shutdown?
"
Keerthy - would you spin this as a generic fix?
>>
>> I hope this explains the problem.
>>
>> [1]
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=00917b5c55aeb01322d5ab51af8c025b82959224
>> [2] http://pastebin.ubuntu.com/14326688/
>>
>> [3]
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/am57xx-beagle-x15.dts#n738
>>
>> --
>> Regards,
>> Nishanth Menon
--
Regards,
Nishanth Menon
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