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[RESOLVED] [Arch linux] Kernel configuration / MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
Hello forum, hello Steven!
System: Arch linux i5-760 'nehalem', 8GB RAM Kernel: 5.9.13-lqx1-1-lqx #1 ZEN SMP PREEMPT (and previous versions) Downloaded from: https://liquorix.net/archlinux/$repo/$arch Because of a problem with my PC I checked dmesg and found an some errors with my RAM: [new user link] Short version: [burster@liza ~]$ dmesg | grep mtrr [ 0.000648] MTRR default type: uncachable [ 0.000649] MTRR fixed ranges enabled: [ 0.000653] MTRR variable ranges enabled: [[ 0.002470] mtrr_cleanup: can not find optimal value [ 0.002470] please specify mtrr_gran_size/mtrr_chunk_size [ 0.204519] pmd_set_huge: Cannot satisfy [mem 0xe0000000-0xe0200000] with a huge-page mapping due to MTRR override. I checked your kernel config against 'vanilla', -zen, -ck and -pf and I think this is the reason for the failure: Your conf: :: Code :: [burster@liza ~]$ zgrep -i mtrr /proc/config.gz
CONFIG_MTRR=y CONFIG_MTRR_SANITIZER=y CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1 CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1 Results in this: :: Code :: [burster@liza ~]$ sudo cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 8192MB, count=1: write-back reg01: base=0x200000000 ( 8192MB), size= 512MB, count=1: write-back reg02: base=0x220000000 ( 8704MB), size= 256MB, count=1: write-back reg03: base=0x230000000 ( 8960MB), size= 64MB, count=1: write-back reg04: base=0x0cc000000 ( 3264MB), size= 64MB, count=1: uncachable reg05: base=0x0d0000000 ( 3328MB), size= 256MB, count=1: uncachable reg06: base=0x0e0000000 ( 3584MB), size= 512MB, count=1: uncachable While the other kernels have: :: Code :: [burster@liza ~]$ zgrep -i mtrr /proc/config.gz
CONFIG_MTRR=y CONFIG_MTRR_SANITIZER=y CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1 CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=0 Gives: :: Code :: [burster@liza ~]$ dmesg | grep mtrr
[ 0.001279] MTRR default type: uncachable [ 0.001279] MTRR fixed ranges enabled: [ 0.001285] MTRR variable ranges enabled: [ 0.003146] Found optimal setting for mtrr clean up and: :: Code :: [burster@liza ~]$ sudo cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back reg01: base=0x080000000 ( 2048MB), size= 1024MB, count=1: write-back reg02: base=0x0c0000000 ( 3072MB), size= 128MB, count=1: write-back reg03: base=0x0c8000000 ( 3200MB), size= 64MB, count=1: write-back reg04: base=0x100000000 ( 4096MB), size= 4096MB, count=1: write-back reg05: base=0x200000000 ( 8192MB), size= 512MB, count=1: write-back reg06: base=0x220000000 ( 8704MB), size= 256MB, count=1: write-back reg07: base=0x230000000 ( 8960MB), size= 64MB, count=1: write-back Because I really want to use your kernel it would be nice if you change the one value. ...or at least tell my why not ;) Regards, burster Back to top |
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Yep, I think there's no reason for that configuration to be the way it is. I remember turning it on way back when MTRR cleanup was a new feature, but I never revisited it once the values were set.
Next release should be coming out soon with that configuration fixed and the latest stable queue patches at the time of building. Back to top |
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Thanks for the fast and positive reply.
Kernel is up and running fine (and I'm happy). Regards, burster Back to top |
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