* Suspend not working with SATA:
@ 2003-12-15 15:00 Witold Krecicki
2003-12-15 15:18 ` Jeff Garzik
0 siblings, 1 reply; 3+ messages in thread
From: Witold Krecicki @ 2003-12-15 15:00 UTC (permalink / raw)
To: Linux Kernel Mailing List
Stopping tasks:
==================================================================
stopping tasks failed (2 tasks remaining)
Restarting tasks...<6> Strange, katad-1 not stopped
Strange, katad-2 not stopped
done
--
Witold Kręcicki (adasi) adasi [at] culm.net
GPG key: 7AE20871
http://www.culm.net
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Suspend not working with SATA:
2003-12-15 15:00 Suspend not working with SATA: Witold Krecicki
@ 2003-12-15 15:18 ` Jeff Garzik
2003-12-15 18:22 ` Nigel Cunningham
0 siblings, 1 reply; 3+ messages in thread
From: Jeff Garzik @ 2003-12-15 15:18 UTC (permalink / raw)
To: Witold Krecicki; +Cc: Linux Kernel Mailing List
Witold Krecicki wrote:
> Stopping tasks:
> ==================================================================
> stopping tasks failed (2 tasks remaining)
> Restarting tasks...<6> Strange, katad-1 not stopped
> Strange, katad-2 not stopped
> done
Both Pavel Machek and I posted test patches to address this...
basically, because of the design of swsusp, you must copy-n-paste the
following code into every single kernel thread:
if (current->flags & PF_FREEZE)
refrigerator(PF_IOTHREAD);
But I consider suspend untested at best... for reboot and suspend the
driver should issue flush-cache and other things beyond simply freezing
the kernel thread. Further, suspending will suck if the kernel thread
itself is the one doing I/O on behalf of the driver. This occurs if the
transfer mode is PIO rather than DMA.
Jeff
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Suspend not working with SATA:
2003-12-15 15:18 ` Jeff Garzik
@ 2003-12-15 18:22 ` Nigel Cunningham
0 siblings, 0 replies; 3+ messages in thread
From: Nigel Cunningham @ 2003-12-15 18:22 UTC (permalink / raw)
To: Jeff Garzik; +Cc: Witold Krecicki, Linux Kernel Mailing List
Hi.
Set PF_IOTHREAD on the task's flags instead. That will allow it to run
during suspending.
Regards,
Nigel
On Tue, 2003-12-16 at 04:18, Jeff Garzik wrote:
> Witold Krecicki wrote:
> > Stopping tasks:
> > ==================================================================
> > stopping tasks failed (2 tasks remaining)
> > Restarting tasks...<6> Strange, katad-1 not stopped
> > Strange, katad-2 not stopped
> > done
>
>
> Both Pavel Machek and I posted test patches to address this...
> basically, because of the design of swsusp, you must copy-n-paste the
> following code into every single kernel thread:
>
> if (current->flags & PF_FREEZE)
> refrigerator(PF_IOTHREAD);
>
> But I consider suspend untested at best... for reboot and suspend the
> driver should issue flush-cache and other things beyond simply freezing
> the kernel thread. Further, suspending will suck if the kernel thread
> itself is the one doing I/O on behalf of the driver. This occurs if the
> transfer mode is PIO rather than DMA.
>
> Jeff
>
>
>
> -
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--
My work on Software Suspend is graciously brought to you by
LinuxFund.org.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2003-12-15 15:00 Suspend not working with SATA: Witold Krecicki
2003-12-15 15:18 ` Jeff Garzik
2003-12-15 18:22 ` Nigel Cunningham
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