X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fum%2FKconfig;h=1fb4623e83ebf018bf0bf3e535dbbe03341490da;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=43ba3cc119bee95b48d06945f62ed1bd506928d9;hpb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;p=linux-2.6.git

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 43ba3cc11..1fb4623e8 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -30,10 +30,28 @@ config PCI
 config PCMCIA
 	bool
 
+# Yet to do!
+config TRACE_IRQFLAGS_SUPPORT
+	bool
+	default n
+
+config LOCKDEP_SUPPORT
+	bool
+	default y
+
+config STACKTRACE_SUPPORT
+	bool
+	default y
+
 config GENERIC_CALIBRATE_DELAY
 	bool
 	default y
 
+config GENERIC_BUG
+	bool
+	default y
+	depends on BUG
+
 # Used in kernel/irq/manage.c and include/linux/irq.h
 config IRQ_RELEASE_METHOD
 	bool
@@ -42,13 +60,16 @@ config IRQ_RELEASE_METHOD
 menu "UML-specific options"
 
 config MODE_TT
-	bool "Tracing thread support"
+	bool "Tracing thread support (DEPRECATED)"
 	default n
+	depends on BROKEN
 	help
 	This option controls whether tracing thread support is compiled
-	into UML.  This option is largely obsolete, given that skas0 provides
+	into UML. This option is largely obsolete, given that skas0 provides
 	skas security and performance without needing to patch the host.
-	It is safe to say 'N' here.
+	It is safe to say 'N' here; saying 'Y' may cause additional problems
+	with the resulting binary even if you run UML in SKAS mode, and running
+	in TT mode is strongly *NOT RECOMMENDED*.
 
 config STATIC_LINK
 	bool "Force a static link"
@@ -61,6 +82,9 @@ config STATIC_LINK
 	for use in a chroot jail.  So, if you intend to run UML inside a
 	chroot, and you disable CONFIG_MODE_TT, you probably want to say Y
 	here.
+	Additionally, this option enables using higher memory spaces (up to
+	2.75G) for UML - disabling CONFIG_MODE_TT and enabling this option leads
+	to best results for this.
 
 config KERNEL_HALF_GIGS
 	int "Kernel address space size (in .5G units)"
@@ -77,10 +101,13 @@ config MODE_SKAS
 	default y
 	help
 	This option controls whether skas (separate kernel address space)
-	support is compiled in.  If you have applied the skas patch to the
-	host, then you certainly want to say Y here (and consider saying N
-	to CONFIG_MODE_TT).  Otherwise, it is safe to say Y.  Disabling this
-	option will shrink the UML binary slightly.
+	support is compiled in.
+	Unless you have specific needs to use TT mode (which applies almost only
+	to developers), you should say Y here.
+	SKAS mode will make use of the SKAS3 patch if it is applied on the host
+	(and your UML will run in SKAS3 mode), but if no SKAS patch is applied
+	on the host it will run in SKAS0 mode, which is anyway faster than TT
+	mode.
 
 source "arch/um/Kconfig.arch"
 source "mm/Kconfig"
@@ -262,7 +289,7 @@ config UML_REAL_TIME_CLOCK
 	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
-	noticable lag.  If this is a problem, then disable this option.
+	noticeable lag.  If this is a problem, then disable this option.
 
 endmenu