Hi, On Sunday, 18 of November 2007, Francis Moreau wrote: > Hello, > > I'm trying to get an idea on how suspend works on Linux. I already looked at > Documentation/power, but I'm clueless about x86 architectures. They don't > seem to define any suspend ops. Yes, they do, via ACPI. Please see drivers/acpi/sleep/main.c . > Can anyone give me some pointers or some hints, I'd like to look at the > low level part of the suspend on these architectures also I'd like to know > what kind of events wake up the system once it's suspended. I guess > interrupts are used but which ones exactly. This also is controlled by ACPI. The ACPI platform firmware handles the wake-up events and transfers control to the kernel by jumping to an address specified before the suspend. > Also I'm wondering how jiffies or system clock are updated correctly after > resuming. AFAICS, we use the pre-suspend value of jiffies. The generic clocksource timekeeping is handled by timekeeping_resume() in kernel/time/timekeeping.c . Greetings, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
