Hi, The following two patches modify the way in which we handle disabling interrupts during suspend and enabling them during resume. Namely, currently interrupts are disabled on the boot CPU as soon as the nonboot CPUs have been disabled, which doesn't allow device drivers' "late" suspend and "early" resume callbacks to sleep. Among other things this means they cannot execute ACPI AML routines, which leads to problems with suspend-resume of PCI devices, as recently discussed on this list. 1/2 is based on an earlier patch from Linus and it only splits up sysdev_[suspend|resume] from the ["late suspend|"early" resume'] of devices. 2/2 actually modifies the [suspend|hibernation] and resume code, as well as the other code using the device PM framework. The patches have been initially tested and they don't appear to break suspend on my boxes, but this is the first approximation only. In particular, I'm not sure if I did the XEN, kexec and APM parts right, so people with experience in these areas are gently requested to have a look and tell me if there's anything to fix in there. Moreover, the real purpose of these changes is to be able to execute the "late" suspend and "early" resume device callbacks with timer interrupts enabled, so that they can use mutexes etc. However, x86 currently doesn't set the IRQF_TIMER flag and I need to make it do so before going further in this direction and changing the PCI PM framework to take advantage of the $subject changes, for example. So, I need to know how to modify x86 timer code so that the IRQF_TIMER flag is set by it. Comments welcome. Thanks, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
