diff options
Diffstat (limited to 'arch/um/Kconfig')
| -rw-r--r-- | arch/um/Kconfig | 189 |
1 files changed, 95 insertions, 94 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index a0e47e271156..4aabb334a84e 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -66,12 +66,12 @@ config STATIC_LINK bool "Force a static link" default n help - This option gives you the ability to force a static link of UML. - Normally, UML is linked as a shared binary. This is inconvenient for - use in a chroot jail. So, if you intend to run UML inside a chroot, - you probably want to say Y here. - Additionally, this option enables using higher memory spaces (up to - 2.75G) for UML. + This option gives you the ability to force a static link of UML. + Normally, UML is linked as a shared binary. This is inconvenient for + use in a chroot jail. So, if you intend to run UML inside a chroot, + you probably want to say Y here. + Additionally, this option enables using higher memory spaces (up to + 2.75G) for UML. source "arch/um/Kconfig.arch" source "mm/Kconfig" @@ -89,18 +89,18 @@ config LD_SCRIPT_DYN config NET bool "Networking support" help - Unless you really know what you are doing, you should say Y here. - The reason is that some programs need kernel networking support even - when running on a stand-alone machine that isn't connected to any - other computer. If you are upgrading from an older kernel, you - should consider updating your networking tools too because changes - in the kernel and the tools often go hand in hand. The tools are - contained in the package net-tools, the location and version number - of which are given in <file:Documentation/Changes>. + Unless you really know what you are doing, you should say Y here. + The reason is that some programs need kernel networking support even + when running on a stand-alone machine that isn't connected to any + other computer. If you are upgrading from an older kernel, you + should consider updating your networking tools too because changes + in the kernel and the tools often go hand in hand. The tools are + contained in the package net-tools, the location and version number + of which are given in <file:Documentation/Changes>. - For a general introduction to Linux networking, it is highly - recommended to read the NET-HOWTO, available from - <http://www.tldp.org/docs.html#howto>. + For a general introduction to Linux networking, it is highly + recommended to read the NET-HOWTO, available from + <http://www.tldp.org/docs.html#howto>. source "fs/Kconfig.binfmt" @@ -108,74 +108,74 @@ source "fs/Kconfig.binfmt" 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 HPPFS tristate "HoneyPot ProcFS (EXPERIMENTAL)" depends on EXPERIMENTAL help - hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc - entries to be overridden, removed, or fabricated from the host. - Its purpose is to allow a UML to appear to be a physical machine - by removing or changing anything in /proc which gives away the - identity of a UML. + hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc + entries to be overridden, removed, or fabricated from the host. + Its purpose is to allow a UML to appear to be a physical machine + by removing or changing anything in /proc which gives away the + identity of a UML. - See <http://user-mode-linux.sf.net/hppfs.html> for more information. + See <http://user-mode-linux.sf.net/hppfs.html> for more information. - You only need this if you are setting up a UML honeypot. Otherwise, - it is safe to say 'N' here. + You only need this if you are setting up a UML honeypot. Otherwise, + it is safe to say 'N' here. config MCONSOLE bool "Management console" 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" depends on MCONSOLE - ---help--- - If you say Y here, you will have some control over the system even - if the system crashes for example during kernel debugging (e.g., you - will be able to flush the buffer cache to disk, reboot the system - immediately or dump some status information). A key for each of the - possible requests is provided. + help + If you say Y here, you will have some control over the system even + if the system crashes for example during kernel debugging (e.g., you + will be able to flush the buffer cache to disk, reboot the system + immediately or dump some status information). A key for each of the + possible requests is provided. - This is the feature normally accomplished by pressing a key - while holding SysRq (Alt+PrintScreen). + This is the feature normally accomplished by pressing a key + while holding SysRq (Alt+PrintScreen). - On UML, this is accomplished by sending a "sysrq" command with - mconsole, followed by the letter for the requested command. + On UML, this is accomplished by sending a "sysrq" command with + mconsole, followed by the letter for the requested command. - The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y - unless you really know what this hack does. + The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y + unless you really know what this hack does. config SMP bool "Symmetric multi-processing support (EXPERIMENTAL)" @@ -183,24 +183,24 @@ config SMP #SMP_BROKEN is for x86_64. depends on EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN)) help - This option enables UML SMP support. - It is NOT related to having a real SMP box. Not directly, at least. + This option enables UML SMP support. + It is NOT related to having a real SMP box. Not directly, at least. - UML implements virtual SMP by allowing as many processes to run - simultaneously on the host as there are virtual processors configured. + UML implements virtual SMP by allowing as many processes to run + simultaneously on the host as there are virtual processors configured. - Obviously, if the host is a uniprocessor, those processes will - timeshare, but, inside UML, will appear to be running simultaneously. - If the host is a multiprocessor, then UML processes may run - simultaneously, depending on the host scheduler. + Obviously, if the host is a uniprocessor, those processes will + timeshare, but, inside UML, will appear to be running simultaneously. + If the host is a multiprocessor, then UML processes may run + simultaneously, depending on the host scheduler. - This, however, is supported only in TT mode. So, if you use the SKAS - patch on your host, switching to TT mode and enabling SMP usually gives - you worse performances. - Also, since the support for SMP has been under-developed, there could - be some bugs being exposed by enabling SMP. + This, however, is supported only in TT mode. So, if you use the SKAS + patch on your host, switching to TT mode and enabling SMP usually + gives you worse performances. + Also, since the support for SMP has been under-developed, there could + be some bugs being exposed by enabling SMP. - If you don't know what to do, say N. + If you don't know what to do, say N. config NR_CPUS int "Maximum number of CPUs (2-32)" @@ -212,24 +212,24 @@ config NEST_LEVEL int "Nesting level" default "0" help - This is set to the number of layers of UMLs that this UML will be run - in. Normally, this is zero, meaning that it will run directly on the - host. Setting it to one will build a UML that can run inside a UML - that is running on the host. Generally, if you intend this UML to run - inside another UML, set CONFIG_NEST_LEVEL to one more than the host - UML. + This is set to the number of layers of UMLs that this UML will be run + in. Normally, this is zero, meaning that it will run directly on the + host. Setting it to one will build a UML that can run inside a UML + that is running on the host. Generally, if you intend this UML to run + inside another UML, set CONFIG_NEST_LEVEL to one more than the host + UML. config HIGHMEM bool "Highmem support (EXPERIMENTAL)" depends on !64BIT && EXPERIMENTAL default n help - This was used to allow UML to run with big amounts of memory. - Currently it is unstable, so if unsure say N. + This was used to allow UML to run with big amounts of memory. + Currently it is unstable, so if unsure say N. - To use big amounts of memory, it is recommended enable static - linking (i.e. CONFIG_STATIC_LINK) - this should allow the - guest to use up to 2.75G of memory. + To use big amounts of memory, it is recommended enable static + linking (i.e. CONFIG_STATIC_LINK) - this should allow the + guest to use up to 2.75G of memory. config KERNEL_STACK_ORDER int "Kernel stack size order" @@ -237,20 +237,21 @@ config KERNEL_STACK_ORDER range 1 10 if 64BIT default 0 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. + 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. config UML_REAL_TIME_CLOCK bool "Real-time Clock" default y help - This option makes UML time deltas match wall clock deltas. This should - normally be enabled. The exception would be if you are debugging with - UML and spend long times with UML stopped at a breakpoint. In this - case, when UML is restarted, it will call the timer enough times to make - up for the time spent at the breakpoint. This could result in a - noticeable lag. If this is a problem, then disable this option. + This option makes UML time deltas match wall clock deltas. This + should normally be enabled. The exception would be if you are + debugging with UML and spend long times with UML stopped at a + breakpoint. In this case, when UML is restarted, it will call the + timer enough times to make up for the time spent at the breakpoint. + This could result in a noticeable lag. If this is a problem, then + disable this option. endmenu |