On Tuesday, January 18, 2011, Jeff Chua wrote: > On Tue, Jan 18, 2011 at 2:55 AM, Brown, Len <len.brown@xxxxxxxxx> wrote: > > added Linux-acpi to cc > > > > any difference if you boot with acpi_sleep=nonvs ? > > That works. > > On Tue, Jan 18, 2011 at 8:14 AM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > >> What happens if you replace the acpi_os_map_memory() in > >> suspend_nvs_save() with ioremap_cache() and the acpi_os_unmap_memory() in > >> suspend_nvs_free() with iounmap() ? > > > > IOW, can you please test if the patch below makes a difference? > > drivers/acpi/nvs.c | 6 +++--- > > 1 file changed, 3 insertions(+), 3 deletions(-) > > That works too. Interesting. Do you have CONFIG_RCU_CPU_STALL_DETECTOR set? If not, please set it. Then, set CONFIG_RCU_CPU_STALL_TIMEOUT to something like 10 (in either case), run a suspend-resume cycle and see if there are any CPU stalls reported in the logs. We can avoid calling synchronize_rcu() in suspend_nvs_free(), but I'd like to know _why_ it's stalling in there. > Now I have another problem which might be totally unrelated. Just > realized that my notebook can't suspend to "disk" ... used to work > last week. So, something has changed as well. May be someone has > already reported/fixed this. Not that I know of. What do you mean by "can't suspend"? Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
