On Wednesday, February 23, 2011, Martin Steigerwald wrote: > Am Tuesday 22 February 2011 schrieb Rafael J. Wysocki: > > On Tuesday, February 22, 2011, Martin Steigerwald wrote: > > > Am Tuesday 22 February 2011 schrieb Rafael J. Wysocki: > > > > On Tuesday, February 22, 2011, Martin Steigerwald wrote: > > > > > Hi! > > > > > > > > > > Since Radeon KMS I often have it that my ThinkPad T42 with 2 MiB > > > > > of RAM is not able to allocate memory for the hibernation image. > > > > > Before KMS hibernation only very rarely failed for that reason. > > > > > > > > > > Often I run without compositing at all as I believe this might > > > > > spare some pages as well. But this doesn't always help. > > > > > > > > > > It complains that to less pages could be freed. For example with > > > > > kernel 2.6.37: > > > > > > > > > > Feb 16 00:15:00 shambhala kernel: PM: Creating hibernation image: > > > > > Feb 16 00:15:00 shambhala kernel: PM: Need to copy 186577 pages > > > > > Feb 16 00:15:00 shambhala kernel: PM: Normal pages needed: 114411 > > > > > + 1024, available pages: 112767 > > > > > Feb 16 00:15:00 shambhala kernel: PM: Not enough free memory > > > > > Feb 16 00:15:00 shambhala kernel: PM: Error -12 creating > > > > > hibernation image Feb 16 00:15:00 shambhala kernel: Extended > > > > > CMOS year: 2000 Feb 16 00:15:00 shambhala kernel: ACPI: Waking > > > > > up from system sleep state S4 > > > > > Feb 16 00:15:00 shambhala kernel: PM: early recover of devices > > > > > complete after 0.376 msecs > > > > > > > > What's the value in /sys/power/image_size? > > > > > > shambhala:~> cat /sys/power/image_size > > > 844206080 > > > > > > Should I try with less? > > > > Yes, please. Try with 700000000 for example. > > I replaced dropping by settings image_size to this valua and the ThinkPad > hibernated with KMail open. Thus seems to work, but I will test a bit > further. > > Where does the higher value previously set come from? Autotuning? Likely. The number seems to match at least. > Is there anything that can be improved with autotuning? We can lower the ratio of the image size to the total RAM. Alternatively, we can increase SPARE_PAGES. > If yes, I can file a bug report. Yes, please. > Otherwise I just try to find a good value for image size and be > done with it. It would be helpful if you could determine the greatest image size working for you. Thanks, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
