Messages in this thread | | | Date | Sun, 14 Jun 2015 11:13:04 +0800 | Subject | Re: lockup when C1E and high-resolution timers enabled | From | Daniel J Blueman <> |
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On Sunday, June 14, 2015 at 4:00:06 AM UTC+8, Christoph Fritz wrote: > Hi, > > on following computer configuration, I do get hard lockup under heavy > IO-Load (using rsync): > > - CONFIG_HIGH_RES_TIMERS=y > - CPU: AMD FX(tm)-8350 Eight-Core Processor (family 0x15 model 0x2) > - Motherboard: 'GA-970A-UD3P (rev. 1.0)' AMD 970/SB950 > - BIOS: C1E enabled (on 'GA-970A-UD3P' there is no disable option) > - Kernels: 4.1.0-rc6, 4.0.x, 3.16.x > > Tests: > - add kernel parameter "idle=halt" -> system runs fine > - disable CONFIG_HIGH_RES_TIMERS -> system runs fine > - change motherboard and disable C1E -> system runs fine > - change CPU to AMD Phenom II X6 Processor -> system runs fine [..]
C1E disconnects HyperTransport links when all cores enter C1 (halt) for a period of time; this is all at the platform level, so isn't due to the kernel. The AMD AGESA code which controls the setup of this mechanism is updated in the F2g BIOS: http://www.gigabyte.com/products/product-page.aspx?pid=4717#bios
Did you try both BIOS releases with defaults?
If still issues, also try with the current family 10h microcode from http://www.amd64.org/microcode/amd-ucode-latest.tar.bz2
Thanks, Daniel -- Daniel J Blueman
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