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-rw-r--r--arch/s390/Kconfig16
1 files changed, 7 insertions, 9 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 70b7645ce745..8116a3328a19 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -241,19 +241,17 @@ config PACK_STACK
241 Say Y if you are unsure. 241 Say Y if you are unsure.
242 242
243config SMALL_STACK 243config SMALL_STACK
244 bool "Use 4kb/8kb for kernel stack instead of 8kb/16kb" 244 bool "Use 8kb for kernel stack instead of 16kb"
245 depends on PACK_STACK && !LOCKDEP 245 depends on PACK_STACK && 64BIT && !LOCKDEP
246 help 246 help
247 If you say Y here and the compiler supports the -mkernel-backchain 247 If you say Y here and the compiler supports the -mkernel-backchain
248 option the kernel will use a smaller kernel stack size. For 31 bit 248 option the kernel will use a smaller kernel stack size. The reduced
249 the reduced size is 4kb instead of 8kb and for 64 bit it is 8kb 249 size is 8kb instead of 16kb. This allows to run more threads on a
250 instead of 16kb. This allows to run more thread on a system and 250 system and reduces the pressure on the memory management for higher
251 reduces the pressure on the memory management for higher order 251 order page allocations.
252 page allocations.
253 252
254 Say N if you are unsure. 253 Say N if you are unsure.
255 254
256
257config CHECK_STACK 255config CHECK_STACK
258 bool "Detect kernel stack overflow" 256 bool "Detect kernel stack overflow"
259 help 257 help
@@ -384,7 +382,7 @@ config IPL
384choice 382choice
385 prompt "IPL method generated into head.S" 383 prompt "IPL method generated into head.S"
386 depends on IPL 384 depends on IPL
387 default IPL_TAPE 385 default IPL_VM
388 help 386 help
389 Select "tape" if you want to IPL the image from a Tape. 387 Select "tape" if you want to IPL the image from a Tape.
390 388