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5-level paging."cr4.la57 features required" [Risolto]
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saverik
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Joined: 18 Oct 2008
Posts: 270

PostPosted: Fri Jan 11, 2019 8:10 am    Post subject: 5-level paging."cr4.la57 features required" [Risol Reply with quote

Buongiorno ,

non riesco a compilare il kernel per il mio processore uno xeon cpu family: 6 model: 62model name : Intel(R) Xeon(R) CPU E5-1620 v2 @ 3.70GHz.
Quando riavvio con il nuovo kernel mi esce schermata nera con questo avviso

Code:

early console in extract_kernel

This linux kernel as configured requires 5-level paging
This cpu does not support the required "cr4.la57" features.
Unable to boot
Please use a kernel appropiate for your cpu.

system halted




Ricercato su internet ho scoperto che il problema possa essere questo
Code:
CONFIG_X86_5LEVEL=y


Ho provato a cercare di risolvere ma non trovo la flag nel kernel , cioe' non ho trovato il modo per deselezionare quella flag.
Suggerimenti?
grazie
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Elitebook G840_G3 cpu i5-6300u ,16GbRam,ToshibaNvme512Gb
Linux= Gentoo64bit+xfce4+LightDm+Openrc


Last edited by saverik on Tue Jan 15, 2019 8:20 am; edited 1 time in total
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fedeliallalinea
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Posts: 21121
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PostPosted: Fri Jan 11, 2019 8:46 am    Post subject: Reply with quote

Quando entry nel menu config e premi il tasto '/' (slash) puoi fare una ricerca.
Code:
   Symbol: X86_5LEVEL [=n] 
   Type  : bool 
   Prompt: Enable 5-level page tables support   
     Location:   
   (1) -> Processor type and features 
     Defined at arch/x86/Kconfig:1465     
     Depends on: X86_64 [=y]                             
     Selects: DYNAMIC_MEMORY_LAYOUT [=n] && SPARSEMEM_VMEMMAP [=y]

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saverik
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Joined: 18 Oct 2008
Posts: 270

PostPosted: Fri Jan 11, 2019 9:34 am    Post subject: Reply with quote

Perfetto grazie .
Code:
Quando entry nel menu config e premi il tasto '/' (slash) puoi fare una ricerca.
Codice:   
   Symbol: X86_5LEVEL [=n]
   Type  : bool
   Prompt: Enable 5-level page tables support   
     Location:   
   (1) -> Processor type and features
     Defined at arch/x86/Kconfig:1465     
     Depends on: X86_64 [=y]                             
     Selects: DYNAMIC_MEMORY_LAYOUT [=n] && SPARSEMEM_VMEMMAP [=y]   

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ok Risolto grazie!!!!!!!!!!
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Elitebook G840_G3 cpu i5-6300u ,16GbRam,ToshibaNvme512Gb
Linux= Gentoo64bit+xfce4+LightDm+Openrc


Last edited by saverik on Tue Jan 15, 2019 8:22 am; edited 1 time in total
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sabayonino
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Joined: 03 Jan 2012
Posts: 660

PostPosted: Fri Jan 11, 2019 6:40 pm    Post subject: Reply with quote

oppure se hai salvato la configurzione con genkernel in /etc/kernels puoi cercare la relativa voce lì oppure editare direttamente il .config in /usr/src/linux
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