On Tuesday, January 04, 2011, Jiri Slaby wrote: > On 01/04/2011 02:40 PM, Jiri Slaby wrote: > > On 12/24/2010 01:58 AM, akpm@xxxxxxxxxxxxxxxxxxxx wrote: > >> The mm-of-the-moment snapshot 2010-12-23-16-58 has been uploaded to > > > > Hi, this kernel regresses with respect to suspend to ram in comparison > > with mmotm 2010-12-16-14-56. > > > > This is OK: > > echo devices > /sys/power/pm_test > > pm-suspend > > This hangs at suspend phase: > > echo platform > /sys/power/pm_test > > pm-suspend Hmm. So it looks like _PTS hangs? > > Note that this kernel is based on next-20101221. Should I try newer (and > > clean) -next? > > Ok, bisected down to: > 16dc39c98a6ca56a27f22f7ac6731d8223237a2e is first bad commit > commit 16dc39c98a6ca56a27f22f7ac6731d8223237a2e > Author: Len Brown <len.brown@xxxxxxxxx> > Date: Thu Dec 16 23:12:23 2010 -0500 > > ACPI: use ioremap_cache() > > Although the temporary boot-time ACPI table mappings > were set up with CPU caching enabled, the permanent table > mappings and AML run-time region memory accesses were > set up with ioremap(), which on x86 is a synonym for > ioremap_nocache(). > > Changing this to ioremap_cache() improves performance as > seen when accessing the tables via acpidump, > or /sys/firmware/acpi/tables. It should also improve > AML run-time performance. > > No change on ia64. > > Reported-by: Jack Steiner <steiner@xxxxxxx> > Signed-off-by: Len Brown <len.brown@xxxxxxxxx> > > :040000 040000 be35c5e8f214f10f94688c1a27f33ecfb8505220 > 52581222d0edf190f160f3e5aa5d2c1af8e76988 M arch > :040000 040000 ccdca0d41938b8312e946cde3c01c59b32d1c17c > 96ccf2357f2ac4a31d19cc41f5728d9f87b6cac0 M drivers > > Revert of that patch fixes the problem. Can you send a dmesg output and acpidump output from the failing system, please? Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
