Messages in this thread | | | Subject | Re: [PATCH] dell-smm-hwmon: Cache fan_type() calls and use fan_status() for fan detection | From | Thorsten Leemhuis <> | Date | Fri, 27 May 2016 10:00:05 +0200 |
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Pali Rohár wrote on 26.05.2016 17:51: > On Thursday 26 May 2016 17:39:57 Thorsten Leemhuis wrote: >> > I need to know if this patch fixes problem on Dell Studio XPS 8000 >> > and Dell Studio XPS 8100 machines, so we can revert git commits: >> > 6220f4ebd7b4 ("hwmon: (dell-smm) Blacklist Dell Studio XPS 8000") >> > a4b45b25f18d ("hwmon: (dell-smm) Blacklist Dell Studio XPS 8100") >> Just checked: Sorry, that patch did not fix the CPU fan speed issue >> on my XPS 8000, so there is afaics no reason to revert 6220f4ebd7b4 >> :-/ > Please, can you apply patch "dell-smm-hwmon: In debug mode log duration > of SMM calls"
On top of "Cache fan_type() calls and use fan_status() for fan detection" or with that patch reverted? I did the latter and tested with 4.6 (just mentioning it here in case it matters).
> and compile dell-smm-hwmon in debug mode to tell us which > SMM call takes too long? This is probably they key for that XPS > problems...
[ 5.941037] dell_smm_hwmon: smm(0xfea3 0x0000) = 0x4147 (took 14470 usecs) [ 5.941139] dell_smm_hwmon: smm(0x11a3 0x0000) = 0xffff (took 93 usecs) [ 5.941236] dell_smm_hwmon: smm(0x11a3 0x0001) = 0xffff (took 93 usecs) [ 5.941331] dell_smm_hwmon: smm(0x11a3 0x0002) = 0xffff (took 92 usecs) [ 5.941427] dell_smm_hwmon: smm(0x11a3 0x0003) = 0xffff (took 92 usecs) [ 5.941526] dell_smm_hwmon: smm(0x03a3 0x0000) = 0x0000 (took 95 usecs) [ 5.941625] dell_smm_hwmon: smm(0x03a3 0x0001) = 0x0001 (took 95 usecs)
HTH, CU, knurd
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