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imon fyre
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Joined: 18 Dec 2003
Posts: 27
Location: sudbury on
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 Posted: Wed Jan 25, 2023 1:59 am Post subject: [solved]failure to unpack *.tar.xz |
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I am trying to do a world update on my i5 laptop, and I am getting errors when trying to unpack tar.xz archives. I have traced the error down to an illegal opcode trap in dmesg. This is the 2nd time that this has happened, the first time I took a working liblzma.so.5.4.1 from my other Gentoo box that has an older Intel cpu.
When I check dmesg, I get the following:
| Code: | [32020.373981] traps: xz[17435] trap invalid opcode ip:7f1ee6428078 sp:7ffc4f67b9a8 error:0 in liblzma.so.5.4.1[7f1ee6418000+1e000]
[95251.603531] traps: xz[15040] trap invalid opcode ip:7f870817a078 sp:7fffdd6ed3a8 error:0 in liblzma.so.5.4.1[7f870816a000+1e000]
[95810.053509] traps: xz[26229] trap invalid opcode ip:7f1a155fb078 sp:7ffd4481d728 error:0 in liblzma.so.5.4.1[7f1a155eb000+1e000]
[96584.156392] traps: xz[5138] trap invalid opcode ip:7f611a805a98 sp:7fff07774cc8 error:0 in liblzma.so.5.4.1[7f611a7f6000+1d000]
[97531.628593] traps: xz[16191] trap invalid opcode ip:7f637eba5a98 sp:7ffc9186a538 error:0 in liblzma.so.5.4.1[7f637eb96000+1d000]
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The changing opcode addresses are from me trying to recompile xz-utils with differenct cpu flags disabled.
I have tried setting X86_CPU_FLAG to something more minimal for xz-utils via package.env, but that does not seem to be happening... Any thoughts or things that I am missing that I can try to eliminate the invalid opcode errors?
CPU: Westmere
Flags: mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3
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Last edited by imon fyre on Wed Jan 25, 2023 3:33 am; edited 1 time in total |
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sam_
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Joined: 14 Aug 2020
Posts: 984
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| Posted: Wed Jan 25, 2023 2:23 am Post subject: |
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| See bug 890853. Your laptop is probably not actually Westmere. |
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grknight
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Joined: 20 Feb 2015
Posts: 657
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| Posted: Wed Jan 25, 2023 2:23 am Post subject: |
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app-arch/xz-utils does not look at CPU_FLAGS_X86 at all.
Instead, whatever is in CFLAGS for -march is too much for this CPU. Suggest using -march=native instead. |
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grknight
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Joined: 20 Feb 2015
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| Posted: Wed Jan 25, 2023 2:27 am Post subject: |
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| sam_ wrote: | | See bug 890853. Your laptop is probably not actually Westmere. |
If it is a Westmere base, it may have features cut out at the factory to price it lower. |
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imon fyre
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Joined: 18 Dec 2003
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| Posted: Wed Jan 25, 2023 3:17 am Post subject: |
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My laptop is one of these -> HP ProBook 6540b Notebook PC, which has an Intel® Core™ i5 i5-430M 2.26 GHz
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imon fyre
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Joined: 18 Dec 2003
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| Posted: Wed Jan 25, 2023 3:23 am Post subject: |
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| grknight wrote: | | Instead, whatever is in CFLAGS for -march is too much for this CPU. Suggest using -march=native instead. |
not advisable, using Distcc to offload most of the compiling to my Ryzen desktop
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imon fyre
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Joined: 18 Dec 2003
Posts: 27
Location: sudbury on
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| Posted: Wed Jan 25, 2023 3:33 am Post subject: |
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| sam_ wrote: | | See bug 890853. Your laptop is probably not actually Westmere. |
creating a env/westmereFix.conf file with
| Code: | | CFLAGS="${CFLAGS} -mno-aes -mno-avx -mno-pclmul" |
seems to have fixed the problem, as was documented in that bug.
Thanks all, marking as solved.
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grknight
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| Posted: Wed Jan 25, 2023 3:33 am Post subject: |
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| imon fyre wrote: | | grknight wrote: | | Instead, whatever is in CFLAGS for -march is too much for this CPU. Suggest using -march=native instead. |
not advisable, using Distcc to offload most of the compiling to my Ryzen desktop |
If that is the case, the script app-misc/resolve-march-native will show what needs to be disabled for that CPU |
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