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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-11-02 12:51:45 +0100 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-11-08 09:47:54 +0100 |
| commit | 978fa72e82e375764e6e31e7a721408c5186918f (patch) | |
| tree | 97daef99cbf741988930e3dfff70081bbdeeb808 /arch/s390/Kconfig | |
| parent | s390/archrandom: Reconsider s390 arch random implementation (diff) | |
| download | linux-978fa72e82e375764e6e31e7a721408c5186918f.tar.xz linux-978fa72e82e375764e6e31e7a721408c5186918f.zip | |
s390: remove named saved segment support
Remove the support to create a z/VM named saved segment (NSS). This
feature is not supported since quite a while in favour of jump labels,
function tracing and (now) CPU alternatives. All of these features
require to write to the kernel text section which is not possible if
the kernel is contained within an NSS.
Given that memory savings are minimal if kernel images are shared and
in addition updates of shared images are painful, the NSS feature can
be removed.
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 080a3fcc3cb8..9fe2fd57bba9 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -824,19 +824,6 @@ config PFAULT Everybody who wants to run Linux under VM != VM4.2 should select this option. -config SHARED_KERNEL - bool "VM shared kernel support" - depends on !JUMP_LABEL - depends on !ALTERNATIVES - help - Select this option, if you want to share the text segment of the - Linux kernel between different VM guests. This reduces memory - usage with lots of guests but greatly increases kernel size. - Also if a kernel was IPL'ed from a shared segment the kexec system - call will not work. - You should only select this option if you know what you are - doing and want to exploit this feature. - config CMM def_tristate n prompt "Cooperative memory management" |