Package: linux-image-2.6.32-5-powerpc64 Version: 2.6.32-31 Tags: patch fixed-upstream squeeze
The 2.6.32-31 kernel from squeeze-proposed-updates (and 2.6.32-30 from squeeze) sets the frequency transition latency on PowerMac G5s' CPUs to CPUFREQ_ETERNAL: # uname -a Linux crash 2.6.32-5-powerpc64 #1 SMP Tue Mar 8 02:01:42 UTC 2011 ppc64 GNU/Linux # dpkg -l linux-image-\* | grep ^ii ii linux-image-2.6-powerpc64 2.6.32+29 Linux 2.6 for 64-bit PowerPC (meta-package) ii linux-image-2.6.32-5-powerpc64 2.6.32-31 Linux 2.6.32 for 64-bit PowerPC # cat /proc/cpuinfo processor : 0 cpu : PPC970FX, altivec supported clock : 2700.000000MHz revision : 3.1 (pvr 003c 0301) processor : 1 cpu : PPC970FX, altivec supported clock : 2700.000000MHz revision : 3.1 (pvr 003c 0301) timebase : 33333333 platform : PowerMac model : PowerMac7,3 machine : PowerMac7,3 motherboard : PowerMac7,3 MacRISC4 Power Macintosh detected as : 336 (PowerMac G5) pmac flags : 00000000 L2 cache : 512K unified pmac-generation : NewWorld # grep . /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_transition_latency /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency:4294967295 /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_transition_latency:4294967295 This keeps the ondemand cpufreq governor from working: # for x in 0 1; do echo ondemand > /sys/devices/system/cpu/cpu$x/cpufreq/scaling_governor; done # dmesg | tail -n 2 [ 1380.988816] ondemand governor failed, too long transition latency of HW, fallback to performance governor [ 1380.990366] ondemand governor failed, too long transition latency of HW, fallback to performance governor This was fixed in the 2.6.32.* tree in March 2009, and the same code is still in use in 2.6.38. Can Debian's 2.6.32 kernel pick up this patch as well? http://git.kernel.org/?p=linux/kernel/git/longterm/linux-2.6.32.y.git;a=commitdiff_plain;h=16962e7ce1dce29e1e92d231ac7d6844d7385d54 Alternatively, in case the above link gets mangled by wrapping: http://bit.ly/gYKmiV -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/3417259a-a31c-43b6-a4d4-4a0df5bba...@vt.edu
