diff options
Diffstat (limited to 'arch/um/Kconfig')
| -rw-r--r-- | arch/um/Kconfig | 58 |
1 files changed, 31 insertions, 27 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index ec9711d068b7..6b6eb938fcc1 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -80,46 +80,46 @@ config LD_SCRIPT_DYN bool default y depends on !LD_SCRIPT_STATIC - select MODULE_REL_CRCS if MODVERSIONS + select MODULE_REL_CRCS if MODVERSIONS config HOSTFS tristate "Host filesystem" help - While the User-Mode Linux port uses its own root file system for - booting and normal file access, this module lets the UML user - access files stored on the host. It does not require any - network connection between the Host and UML. An example use of - this might be: + While the User-Mode Linux port uses its own root file system for + booting and normal file access, this module lets the UML user + access files stored on the host. It does not require any + network connection between the Host and UML. An example use of + this might be: - mount none /tmp/fromhost -t hostfs -o /tmp/umlshare + mount none /tmp/fromhost -t hostfs -o /tmp/umlshare - where /tmp/fromhost is an empty directory inside UML and - /tmp/umlshare is a directory on the host with files the UML user - wishes to access. + where /tmp/fromhost is an empty directory inside UML and + /tmp/umlshare is a directory on the host with files the UML user + wishes to access. - For more information, see - <http://user-mode-linux.sourceforge.net/hostfs.html>. + For more information, see + <http://user-mode-linux.sourceforge.net/hostfs.html>. - If you'd like to be able to work with files stored on the host, - say Y or M here; otherwise say N. + If you'd like to be able to work with files stored on the host, + say Y or M here; otherwise say N. config MCONSOLE bool "Management console" depends on PROC_FS default y help - The user mode linux management console is a low-level interface to - the kernel, somewhat like the i386 SysRq interface. Since there is - a full-blown operating system running under every user mode linux - instance, there is much greater flexibility possible than with the - SysRq mechanism. + The user mode linux management console is a low-level interface to + the kernel, somewhat like the i386 SysRq interface. Since there is + a full-blown operating system running under every user mode linux + instance, there is much greater flexibility possible than with the + SysRq mechanism. - If you answer 'Y' to this option, to use this feature, you need the - mconsole client (called uml_mconsole) which is present in CVS in - 2.4.5-9um and later (path /tools/mconsole), and is also in the - distribution RPM package in 2.4.6 and later. + If you answer 'Y' to this option, to use this feature, you need the + mconsole client (called uml_mconsole) which is present in CVS in + 2.4.5-9um and later (path /tools/mconsole), and is also in the + distribution RPM package in 2.4.6 and later. - It is safe to say 'Y' here. + It is safe to say 'Y' here. config MAGIC_SYSRQ bool "Magic SysRq key" @@ -142,13 +142,17 @@ config MAGIC_SYSRQ config KERNEL_STACK_ORDER int "Kernel stack size order" - default 1 if 64BIT - range 1 10 if 64BIT - default 0 if !64BIT + default 2 if 64BIT + range 2 10 if 64BIT + default 1 if !64BIT help This option determines the size of UML kernel stacks. They will be 1 << order pages. The default is OK unless you're running Valgrind on UML, in which case, set this to 3. + It is possible to reduce the stack to 1 for 64BIT and 0 for 32BIT on + older (pre-2017) CPUs. It is not recommended on newer CPUs due to the + increase in the size of the state which needs to be saved when handling + signals. config MMAPPER tristate "iomem emulation driver" |