* maybe: kexec + e100 + CONFIG_PM != working
[not found] ` <87d6gtrjjs.fsf@uga.edu>
@ 2003-07-02 21:06 ` Andy Pfiffer
2003-07-08 16:07 ` Ed L Cashin
0 siblings, 1 reply; 2+ messages in thread
From: Andy Pfiffer @ 2003-07-02 21:06 UTC (permalink / raw)
To: Ed L Cashin; +Cc: fastboot, linux-kernel
On Tue, 2003-07-01 at 15:03, Ed L Cashin wrote:
> Ed L Cashin <ecashin@uga.edu> writes:
>
> ...
> > I haven't tried the experiment you suggested where I disable e100 in
> > the kernel configuration.
>
> OK, I just tried taking out the intel e100 driver and building in
> Becker's eepro100 driver. This kernel can do kexec fine.
I just had lunch with someone that knows a lot more about the e100
driver than I do.
I would be curious to know what happens if you disable CONFIG_PM (as
seen in your .config), disable the eepro100 driver, re-enable the e100
driver, and then try kexec again.
The hint I received is that the e100_suspend() routine could call
pci_set_power_state() on the way down during a kexec, and that could
leave the card in a state that is difficult to resurrect when the new
kernel starts initializing devices.
You might also try commenting out the pci_set_power_state() lines in
e100_suspend() and leave CONFIG_PM enabled (untested diff for
illustration):
--- e100_main.c.orig Wed Jul 2 14:00:59 2003
+++ e100_main.c Wed Jul 2 14:02:22 2003
@@ -4305,11 +4305,11 @@
/* If wol is enabled */
if (bdp->wolopts || e100_asf_enabled(bdp)) {
pci_enable_wake(pcid, 3, 1); /* Enable PME for power state D3 */
- pci_set_power_state(pcid, 3); /* Set power state to D3. */
+ /*pci_set_power_state(pcid, 3);*/ /* Set power state to D3. */
} else {
/* Disable bus mastering */
pci_disable_device(pcid);
- pci_set_power_state(pcid, state);
+ /*pci_set_power_state(pcid, state);*/
}
return 0;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: maybe: kexec + e100 + CONFIG_PM != working
2003-07-02 21:06 ` maybe: kexec + e100 + CONFIG_PM != working Andy Pfiffer
@ 2003-07-08 16:07 ` Ed L Cashin
0 siblings, 0 replies; 2+ messages in thread
From: Ed L Cashin @ 2003-07-08 16:07 UTC (permalink / raw)
To: Andy Pfiffer; +Cc: fastboot, linux-kernel
Andy Pfiffer <andyp@osdl.org> writes:
> On Tue, 2003-07-01 at 15:03, Ed L Cashin wrote:
>> Ed L Cashin <ecashin@uga.edu> writes:
>>
>> ...
>> > I haven't tried the experiment you suggested where I disable e100 in
>> > the kernel configuration.
>>
>> OK, I just tried taking out the intel e100 driver and building in
>> Becker's eepro100 driver. This kernel can do kexec fine.
>
> I just had lunch with someone that knows a lot more about the e100
> driver than I do.
>
> I would be curious to know what happens if you disable CONFIG_PM (as
> seen in your .config), disable the eepro100 driver, re-enable the e100
> driver, and then try kexec again.
Yes, kexec works on the same system when I disable CONFIG_PM and use
the e100 driver. Sorry it took a while for me to get around to
testing it.
I should mention that the kernel is a little different than the other
one I was using. It's 2.5.73-osdl3 with this .config file:
http://www.cs.uga.edu/~cashin/temp/config-2.5.73-osdl3-20030708-120629
--
--Ed L Cashin | PGP public key:
ecashin@uga.edu | http://noserose.net/e/pgp/
^ permalink raw reply [flat|nested] 2+ messages in thread
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2003-07-02 21:06 ` maybe: kexec + e100 + CONFIG_PM != working Andy Pfiffer
2003-07-08 16:07 ` Ed L Cashin
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