MMU-less kernel?
Clash Royale CLAN TAG#URR8PPP
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I would like to try compile mmu-less kernel. From what I found in configuration there is no option for such a thing. Is it possible to be done?
linux kernel linux-kernel memory
add a comment |Â
up vote
5
down vote
favorite
I would like to try compile mmu-less kernel. From what I found in configuration there is no option for such a thing. Is it possible to be done?
linux kernel linux-kernel memory
add a comment |Â
up vote
5
down vote
favorite
up vote
5
down vote
favorite
I would like to try compile mmu-less kernel. From what I found in configuration there is no option for such a thing. Is it possible to be done?
linux kernel linux-kernel memory
I would like to try compile mmu-less kernel. From what I found in configuration there is no option for such a thing. Is it possible to be done?
linux kernel linux-kernel memory
linux kernel linux-kernel memory
asked Mar 15 '15 at 21:56
backman
12813
12813
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add a comment |Â
2 Answers
2
active
oldest
votes
up vote
9
down vote
accepted
You can compile a Linux kernel without MMU support on most processor architectures, including x86. However, because this is a rare configuration only for users who know what they are doing, the option is not included in the menu displayed by make menuconfig
, make xconfig
and the like, except on a few architectures for embedded devices where the lack of MMU is relatively common. You need to edit the .config
file explicitly to change CONFIG_MMU=y
to CONFIG_MMU=n
. Alternatively, you can make the option appear in the menu by editing the file in arch/*/Kconfig
corresponding to your architecture and replacing the stanza starting with CONFIG MMU
by
config MMU
bool "MMU support"
default y
---help---
Say yes. If you say no, most programs won't run.
Even if you make the option appear in the menus, you may need to tweak the resulting configuration to make it internally consistent. MMU-less x86 systems are highly unusual.
The easiest way to experiment with an MMU-less system would be to run a genuine MMU-less system in an emulator, using the Linux kernel configuration provided by the hardware vendor or with the emulator.
In case this wasn't clear, normal Linux systems need an MMU. The Linux kernel can be compiled for systems with no MMU, but this introduces restrictions that prevent a lot of programs from running. Start by reading No-MMU memory mapping support. I don't think you can use glibc without an MMU, õClibc is usually used instead. Documentation from the õClinux project may be relevant as well (õClinux was the original project for a MMU-less Linux, though nowadays support for MMU-less systems has been integrated into the main kernel tree so you don't need to use õClinux).
Thank you, This provided information I needed. Altought I wanted to use it on x86_64 emulator it seems it's not even possible to compile. It was anyway experiment for prt of my thesis.
â backman
Mar 17 '15 at 15:28
That is not working anymore. The build process changesCONFIG_MMU=n
toCONFIG_MMU=y
and builds the kernel with MMU.
â JohnnyFromBF
Apr 13 '17 at 13:15
@JohnnyFromBF I think that falls under âÂÂyou may need to tweak the resulting configuration to make it internally consistentâÂÂ.
â Gilles
Apr 13 '17 at 13:26
I love the humor of those kernel hackers.
â Ciro Santilli æ°çÂÂæ¹é ä¸Âå¿ å ÂÃ¥ÂÂäºÂ件 æ³Âè½®åÂÂ
Aug 27 '17 at 8:16
add a comment |Â
up vote
2
down vote
have a look at ELKS (embeddable linux kernel subset) or verison 1 of Minix
Will definitely check that out.
â backman
Mar 17 '15 at 15:29
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
9
down vote
accepted
You can compile a Linux kernel without MMU support on most processor architectures, including x86. However, because this is a rare configuration only for users who know what they are doing, the option is not included in the menu displayed by make menuconfig
, make xconfig
and the like, except on a few architectures for embedded devices where the lack of MMU is relatively common. You need to edit the .config
file explicitly to change CONFIG_MMU=y
to CONFIG_MMU=n
. Alternatively, you can make the option appear in the menu by editing the file in arch/*/Kconfig
corresponding to your architecture and replacing the stanza starting with CONFIG MMU
by
config MMU
bool "MMU support"
default y
---help---
Say yes. If you say no, most programs won't run.
Even if you make the option appear in the menus, you may need to tweak the resulting configuration to make it internally consistent. MMU-less x86 systems are highly unusual.
The easiest way to experiment with an MMU-less system would be to run a genuine MMU-less system in an emulator, using the Linux kernel configuration provided by the hardware vendor or with the emulator.
In case this wasn't clear, normal Linux systems need an MMU. The Linux kernel can be compiled for systems with no MMU, but this introduces restrictions that prevent a lot of programs from running. Start by reading No-MMU memory mapping support. I don't think you can use glibc without an MMU, õClibc is usually used instead. Documentation from the õClinux project may be relevant as well (õClinux was the original project for a MMU-less Linux, though nowadays support for MMU-less systems has been integrated into the main kernel tree so you don't need to use õClinux).
Thank you, This provided information I needed. Altought I wanted to use it on x86_64 emulator it seems it's not even possible to compile. It was anyway experiment for prt of my thesis.
â backman
Mar 17 '15 at 15:28
That is not working anymore. The build process changesCONFIG_MMU=n
toCONFIG_MMU=y
and builds the kernel with MMU.
â JohnnyFromBF
Apr 13 '17 at 13:15
@JohnnyFromBF I think that falls under âÂÂyou may need to tweak the resulting configuration to make it internally consistentâÂÂ.
â Gilles
Apr 13 '17 at 13:26
I love the humor of those kernel hackers.
â Ciro Santilli æ°çÂÂæ¹é ä¸Âå¿ å ÂÃ¥ÂÂäºÂ件 æ³Âè½®åÂÂ
Aug 27 '17 at 8:16
add a comment |Â
up vote
9
down vote
accepted
You can compile a Linux kernel without MMU support on most processor architectures, including x86. However, because this is a rare configuration only for users who know what they are doing, the option is not included in the menu displayed by make menuconfig
, make xconfig
and the like, except on a few architectures for embedded devices where the lack of MMU is relatively common. You need to edit the .config
file explicitly to change CONFIG_MMU=y
to CONFIG_MMU=n
. Alternatively, you can make the option appear in the menu by editing the file in arch/*/Kconfig
corresponding to your architecture and replacing the stanza starting with CONFIG MMU
by
config MMU
bool "MMU support"
default y
---help---
Say yes. If you say no, most programs won't run.
Even if you make the option appear in the menus, you may need to tweak the resulting configuration to make it internally consistent. MMU-less x86 systems are highly unusual.
The easiest way to experiment with an MMU-less system would be to run a genuine MMU-less system in an emulator, using the Linux kernel configuration provided by the hardware vendor or with the emulator.
In case this wasn't clear, normal Linux systems need an MMU. The Linux kernel can be compiled for systems with no MMU, but this introduces restrictions that prevent a lot of programs from running. Start by reading No-MMU memory mapping support. I don't think you can use glibc without an MMU, õClibc is usually used instead. Documentation from the õClinux project may be relevant as well (õClinux was the original project for a MMU-less Linux, though nowadays support for MMU-less systems has been integrated into the main kernel tree so you don't need to use õClinux).
Thank you, This provided information I needed. Altought I wanted to use it on x86_64 emulator it seems it's not even possible to compile. It was anyway experiment for prt of my thesis.
â backman
Mar 17 '15 at 15:28
That is not working anymore. The build process changesCONFIG_MMU=n
toCONFIG_MMU=y
and builds the kernel with MMU.
â JohnnyFromBF
Apr 13 '17 at 13:15
@JohnnyFromBF I think that falls under âÂÂyou may need to tweak the resulting configuration to make it internally consistentâÂÂ.
â Gilles
Apr 13 '17 at 13:26
I love the humor of those kernel hackers.
â Ciro Santilli æ°çÂÂæ¹é ä¸Âå¿ å ÂÃ¥ÂÂäºÂ件 æ³Âè½®åÂÂ
Aug 27 '17 at 8:16
add a comment |Â
up vote
9
down vote
accepted
up vote
9
down vote
accepted
You can compile a Linux kernel without MMU support on most processor architectures, including x86. However, because this is a rare configuration only for users who know what they are doing, the option is not included in the menu displayed by make menuconfig
, make xconfig
and the like, except on a few architectures for embedded devices where the lack of MMU is relatively common. You need to edit the .config
file explicitly to change CONFIG_MMU=y
to CONFIG_MMU=n
. Alternatively, you can make the option appear in the menu by editing the file in arch/*/Kconfig
corresponding to your architecture and replacing the stanza starting with CONFIG MMU
by
config MMU
bool "MMU support"
default y
---help---
Say yes. If you say no, most programs won't run.
Even if you make the option appear in the menus, you may need to tweak the resulting configuration to make it internally consistent. MMU-less x86 systems are highly unusual.
The easiest way to experiment with an MMU-less system would be to run a genuine MMU-less system in an emulator, using the Linux kernel configuration provided by the hardware vendor or with the emulator.
In case this wasn't clear, normal Linux systems need an MMU. The Linux kernel can be compiled for systems with no MMU, but this introduces restrictions that prevent a lot of programs from running. Start by reading No-MMU memory mapping support. I don't think you can use glibc without an MMU, õClibc is usually used instead. Documentation from the õClinux project may be relevant as well (õClinux was the original project for a MMU-less Linux, though nowadays support for MMU-less systems has been integrated into the main kernel tree so you don't need to use õClinux).
You can compile a Linux kernel without MMU support on most processor architectures, including x86. However, because this is a rare configuration only for users who know what they are doing, the option is not included in the menu displayed by make menuconfig
, make xconfig
and the like, except on a few architectures for embedded devices where the lack of MMU is relatively common. You need to edit the .config
file explicitly to change CONFIG_MMU=y
to CONFIG_MMU=n
. Alternatively, you can make the option appear in the menu by editing the file in arch/*/Kconfig
corresponding to your architecture and replacing the stanza starting with CONFIG MMU
by
config MMU
bool "MMU support"
default y
---help---
Say yes. If you say no, most programs won't run.
Even if you make the option appear in the menus, you may need to tweak the resulting configuration to make it internally consistent. MMU-less x86 systems are highly unusual.
The easiest way to experiment with an MMU-less system would be to run a genuine MMU-less system in an emulator, using the Linux kernel configuration provided by the hardware vendor or with the emulator.
In case this wasn't clear, normal Linux systems need an MMU. The Linux kernel can be compiled for systems with no MMU, but this introduces restrictions that prevent a lot of programs from running. Start by reading No-MMU memory mapping support. I don't think you can use glibc without an MMU, õClibc is usually used instead. Documentation from the õClinux project may be relevant as well (õClinux was the original project for a MMU-less Linux, though nowadays support for MMU-less systems has been integrated into the main kernel tree so you don't need to use õClinux).
answered Mar 15 '15 at 22:37
Gilles
508k12010051534
508k12010051534
Thank you, This provided information I needed. Altought I wanted to use it on x86_64 emulator it seems it's not even possible to compile. It was anyway experiment for prt of my thesis.
â backman
Mar 17 '15 at 15:28
That is not working anymore. The build process changesCONFIG_MMU=n
toCONFIG_MMU=y
and builds the kernel with MMU.
â JohnnyFromBF
Apr 13 '17 at 13:15
@JohnnyFromBF I think that falls under âÂÂyou may need to tweak the resulting configuration to make it internally consistentâÂÂ.
â Gilles
Apr 13 '17 at 13:26
I love the humor of those kernel hackers.
â Ciro Santilli æ°çÂÂæ¹é ä¸Âå¿ å ÂÃ¥ÂÂäºÂ件 æ³Âè½®åÂÂ
Aug 27 '17 at 8:16
add a comment |Â
Thank you, This provided information I needed. Altought I wanted to use it on x86_64 emulator it seems it's not even possible to compile. It was anyway experiment for prt of my thesis.
â backman
Mar 17 '15 at 15:28
That is not working anymore. The build process changesCONFIG_MMU=n
toCONFIG_MMU=y
and builds the kernel with MMU.
â JohnnyFromBF
Apr 13 '17 at 13:15
@JohnnyFromBF I think that falls under âÂÂyou may need to tweak the resulting configuration to make it internally consistentâÂÂ.
â Gilles
Apr 13 '17 at 13:26
I love the humor of those kernel hackers.
â Ciro Santilli æ°çÂÂæ¹é ä¸Âå¿ å ÂÃ¥ÂÂäºÂ件 æ³Âè½®åÂÂ
Aug 27 '17 at 8:16
Thank you, This provided information I needed. Altought I wanted to use it on x86_64 emulator it seems it's not even possible to compile. It was anyway experiment for prt of my thesis.
â backman
Mar 17 '15 at 15:28
Thank you, This provided information I needed. Altought I wanted to use it on x86_64 emulator it seems it's not even possible to compile. It was anyway experiment for prt of my thesis.
â backman
Mar 17 '15 at 15:28
That is not working anymore. The build process changes
CONFIG_MMU=n
to CONFIG_MMU=y
and builds the kernel with MMU.â JohnnyFromBF
Apr 13 '17 at 13:15
That is not working anymore. The build process changes
CONFIG_MMU=n
to CONFIG_MMU=y
and builds the kernel with MMU.â JohnnyFromBF
Apr 13 '17 at 13:15
@JohnnyFromBF I think that falls under âÂÂyou may need to tweak the resulting configuration to make it internally consistentâÂÂ.
â Gilles
Apr 13 '17 at 13:26
@JohnnyFromBF I think that falls under âÂÂyou may need to tweak the resulting configuration to make it internally consistentâÂÂ.
â Gilles
Apr 13 '17 at 13:26
I love the humor of those kernel hackers.
â Ciro Santilli æ°çÂÂæ¹é ä¸Âå¿ å ÂÃ¥ÂÂäºÂ件 æ³Âè½®åÂÂ
Aug 27 '17 at 8:16
I love the humor of those kernel hackers.
â Ciro Santilli æ°çÂÂæ¹é ä¸Âå¿ å ÂÃ¥ÂÂäºÂ件 æ³Âè½®åÂÂ
Aug 27 '17 at 8:16
add a comment |Â
up vote
2
down vote
have a look at ELKS (embeddable linux kernel subset) or verison 1 of Minix
Will definitely check that out.
â backman
Mar 17 '15 at 15:29
add a comment |Â
up vote
2
down vote
have a look at ELKS (embeddable linux kernel subset) or verison 1 of Minix
Will definitely check that out.
â backman
Mar 17 '15 at 15:29
add a comment |Â
up vote
2
down vote
up vote
2
down vote
have a look at ELKS (embeddable linux kernel subset) or verison 1 of Minix
have a look at ELKS (embeddable linux kernel subset) or verison 1 of Minix
answered Mar 15 '15 at 22:12
Jasen
1,969713
1,969713
Will definitely check that out.
â backman
Mar 17 '15 at 15:29
add a comment |Â
Will definitely check that out.
â backman
Mar 17 '15 at 15:29
Will definitely check that out.
â backman
Mar 17 '15 at 15:29
Will definitely check that out.
â backman
Mar 17 '15 at 15:29
add a comment |Â
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