Hi
With the kernel 4.7-rc1, I get corrupted printk times when the machine
boots. The kernel is compiled with "Show timing information on printks"
(CONFIG_PRINTK_TIME) enabled. There are no other negative effects.
Bisecting shows that it is caused by the patch
54b668009076caddbede8fde513ca2c982590bfe ("parisc: Add native
high-resolution sched_clock() implementation").
Mikulas
[ 0.000000] SLUB: HWalign=16, Order=0-3, MinObjects=0, CPUs=4, Nodes=8
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] Build-time adjustment of leaf fanout to 64.
[ 0.000000] NR_IRQS:80
[ 0.000000] clocksource: cr16: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.000000] Console: colour dummy device 160x64
[ 90.122205] Calibrating delay loop... 1991.60 BogoMIPS (lpj=3317760)
[ 90.224168] pid_max: default: 32768 minimum: 301
[ 90.285769] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes)
[ 90.377394] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes)
[ 90.476416] Brought up 1 CPUs
[ 90.518549] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 6370867519511994 ns
[ 90.648779] NET: Registered protocol family 16
[ 90.708239] Searching for devices...
[ 90.869035] Found devices:
[ 90.904983] 1. Crestone Peak Mako+ Slow at 0xfffffffffe780000 [128] { 0, 0x0, 0x89b, 0x00004 }
[ 91.019867] 2. Crestone Peak Mako+ Slow at 0xfffffffffe781000 [129] { 0, 0x0, 0x89b, 0x00004 }
[ 91.134765] 3. Crestone Peak Mako+ Slow at 0xfffffffffe798000 [152] { 0, 0x0, 0x89b, 0x00004 }
[ 91.249651] 4. Crestone Peak Mako+ Slow at 0xfffffffffe799000 [153] { 0, 0x0, 0x89b, 0x00004 }
[ 91.364550] 5. Memory at 0xfffffffffed08000 [8] { 1, 0x0, 0x0b6, 0x00009 }
[ 91.456208] 6. Pluto BC McKinley Port at 0xfffffffffed00000 [0] { 12, 0x0, 0x880, 0x0000c }
[ 91.567565] 7. Mercury PCI Bridge at 0xfffffffffed20000 [0/0] { 13, 0x0, 0x783, 0x0000a }
[ 91.676618] 8. Mercury PCI Bridge at 0xfffffffffed24000 [0/2] { 13, 0x0, 0x783, 0x0000a }
[ 91.785683] 9. Mercury PCI Bridge at 0xfffffffffed26000 [0/3] { 13, 0x0, 0x783, 0x0000a }
[ 91.894743] 10. Quicksilver AGP Bridge at 0xfffffffffed28000 [0/4] { 13, 0x0, 0x784, 0x0000a }
[ 92.009628] 11. BMC IPMI Mgmt Ctlr at 0xfffffff0f05b0000 [16] { 15, 0x0, 0x004, 0x000c0 }
[ 92.118694] 12. Crestone Peak Core RS-232 at 0xfffffff0f05e0000 [17] { 10, 0x0, 0x076, 0x000ad }
[ 92.235878] 13. Crestone Peak Core RS-232 at 0xfffffff0f05e2000 [18] { 10, 0x0, 0x076, 0x000ad }
[ 92.708000] Releasing cpu 1 now, hpa=fffffffffe781000
[ 92.818803] FP[1] enabled: Rev 1 Model 20
[ 2.917508] Releasing cpu 2 now, hpa=fffffffffe798000
[ 0.196666] FP[2] enabled: Rev 1 Model 20
[ 3.116794] Releasing cpu 3 now, hpa=fffffffffe799000
[ 0.196666] FP[3] enabled: Rev 1 Model 20
[ 3.296942] CPU(s): 4 out of 4 PA8900 (Shortfin) at 1000.000000 MHz online
[ 3.447762] Setting cache flush threshold to 65536 kB
[ 3.450548] Setting TLB flush threshold to 1020 kB
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