Hi, The following 6 patches try to add suspend-to-ram (or S3) SMP support for IA32. It's for support HT based system suspend/resume currently and most of the code are also useful for physical CPU hotplug.
In a SMP system, after S3 resume, the BP is starting to execute the ACPI wakeup address just like the UP case. And the APs possibly are in a BIOS's busy loop. This just looks like the boot time case, we must use a SIPI circle to wakeup the APs. We uses the CPU hotplug infrastructure. In order to reuse the SMP boot code, we clean up all CPU states after the CPU is dead, including its idle thread, runqueue and other CPU states. Since the CPU is in idle thread before suspend, we don't require to save and restore after resume most of the CPU states. Now the sequences of S3 are: 1. hotremove all APs, put them into idle thread. 2. follow UP S3 code path. 3. warm boot all APs. 4. UP all APs. The patches are against 2.6.11-rc1 with Zwane's CPU hotplug patch in -mm tree. To test the SMP S3, please don't enable MTRR driver (it's SMP broken for Suspend/resume). And please kill syslogd, there is a bug in the sususpend/resume refrigerator mechanism, which can be fixed by swsusp2 refrigerator. I'm looking forward to your comments. Thanks in advance! Thanks, Shaohua - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
