Re: SCHED_BATCH not stopped (swsusp fails)

[Con Kolivas <lkml@kolivas.org>]

Pavel Machek wrote:
> Hi!
> 
> 
>>SCHED_BATCH processes dont seem to heed the `stop' request (order?) by
>>swsusp.  I run httpd and mysqld (for my wiki page) with SCHED_BATCH (so
>>that I can work on my computer even if the load is very high) but when I
>>try to suspend the system, it tries to stop the tasks and simply returns.
>>Here is the dmesg output (paritial)
> 
> 
> Aha, so if it mysqld is not running SCHED_BATCH priority, stopping
> mysqld will work ok?

That makes sense.

Sorry, SCHED_BATCH is unique to my tree at the moment so this is my 
mistake for not considering it. I'll have to transiently schedule 
SCHED_BATCH tasks as SCHED_NORMAL if we are going into swsusp. It's 
something I'll have to work on. In the interim, a workaround would be to 
convert all httpd threads to SCHED_NORMAL before shutting down in your 
scripts somewhere and convert them back after resuming.

Cheers,
Con

P.S. Raj the --cutme-- thing in your email is very annoying for those of 
us who reply to up to 300 emails a day (and yes I do know why you do it, 
but if you keep doing it people will stop replying directly to you).