Messages in this thread |  | | Subject | Re: 50 Watt idle power regression bisected to Linux-3.10 | From | "H. Peter Anvin" <> | Date | Wed, 11 Dec 2013 21:45:55 -0800 |
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As in it hangs at that point?
Mike Galbraith <bitbucket@online.de> wrote: >On Wed, 2013-12-11 at 20:49 -0800, H. Peter Anvin wrote: >> On 12/11/2013 08:25 PM, Mike Galbraith wrote: >> > arch/x86/include/asm/mwait.h | 4 ++-- >> > arch/x86/kernel/cpu/common.c | 7 ++++--- >> > arch/x86/kernel/setup_percpu.c | 1 + >> > 3 files changed, 7 insertions(+), 5 deletions(-) >> > >> > Index: linux-2.6/arch/x86/kernel/cpu/common.c >> > =================================================================== >> > --- linux-2.6.orig/arch/x86/kernel/cpu/common.c >> > +++ linux-2.6/arch/x86/kernel/cpu/common.c >> > @@ -65,13 +65,14 @@ void __init setup_cpu_local_masks(void) >> > } >> > >> > /* allocate percpu area for mwait doorbell */ >> > -char __percpu *mwait_doorbell; >> > +DEFINE_PER_CPU(char *, mwait_doorbell); >> > +EXPORT_PER_CPU_SYMBOL(mwait_doorbell); >> > >> >> Sorry, this is wrong. This is NOT a percpu variable, it is a pointer >to >> a percpu allocation, but the variable itself is not a percpu >variable. >> This explains your boom. > >With that fixed, it boots, but is not quite perfect. > >... >[ 258.560079] fbcon: radeondrmfb (fb0) is primary device >[ 258.722483] Console: switching to colour frame buffer device 128x48 >[ 258.847076] radeon 0000:01:03.0: fb0: radeondrmfb frame buffer >device >[ 258.911991] radeon 0000:01:03.0: registered panic notifier >[ 258.968772] [drm] Initialized radeon 2.35.0 20080528 for >0000:01:03.0 on minor 0 >... >[ 469.738604] netxen_nic 0000:04:00.3: using msi-x interrupts >[ 469.739078] netxen_nic 0000:04:00.3: eth5: GbE port initialized >[ 469.830512] ipmi_si 00:01: Found new BMC (man_id: 0x00000b, prod_id: >0x2000, dev_id: 0x13) >[ 469.830524] ipmi_si 00:01: IPMI kcs interface initialized >[ 473.729862] iTCO_wdt: unable to reset NO_REBOOT flag, device >disabled by hardware/BIOS >... >[ 711.636741] fuse init (API version 7.22) > >...zzzz ok box, doctor appointment is in an hour away. > >-Mike
-- Sent from my mobile phone. Please pardon brevity and lack of formatting.
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