diff options
Diffstat (limited to 'arch/um/Kconfig.um')
-rw-r--r-- | arch/um/Kconfig.um | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um index a7520c90f62d..ff86fbedc2fc 100644 --- a/arch/um/Kconfig.um +++ b/arch/um/Kconfig.um | |||
@@ -95,36 +95,6 @@ config MAGIC_SYSRQ | |||
95 | The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y | 95 | The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y |
96 | unless you really know what this hack does. | 96 | unless you really know what this hack does. |
97 | 97 | ||
98 | config SMP | ||
99 | bool "Symmetric multi-processing support" | ||
100 | default n | ||
101 | depends on BROKEN | ||
102 | help | ||
103 | This option enables UML SMP support. | ||
104 | It is NOT related to having a real SMP box. Not directly, at least. | ||
105 | |||
106 | UML implements virtual SMP by allowing as many processes to run | ||
107 | simultaneously on the host as there are virtual processors configured. | ||
108 | |||
109 | Obviously, if the host is a uniprocessor, those processes will | ||
110 | timeshare, but, inside UML, will appear to be running simultaneously. | ||
111 | If the host is a multiprocessor, then UML processes may run | ||
112 | simultaneously, depending on the host scheduler. | ||
113 | |||
114 | This, however, is supported only in TT mode. So, if you use the SKAS | ||
115 | patch on your host, switching to TT mode and enabling SMP usually | ||
116 | gives you worse performances. | ||
117 | Also, since the support for SMP has been under-developed, there could | ||
118 | be some bugs being exposed by enabling SMP. | ||
119 | |||
120 | If you don't know what to do, say N. | ||
121 | |||
122 | config NR_CPUS | ||
123 | int "Maximum number of CPUs (2-32)" | ||
124 | range 2 32 | ||
125 | depends on SMP | ||
126 | default "32" | ||
127 | |||
128 | config HIGHMEM | 98 | config HIGHMEM |
129 | bool "Highmem support" | 99 | bool "Highmem support" |
130 | depends on !64BIT && BROKEN | 100 | depends on !64BIT && BROKEN |