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Date: Mon, 4 Dec 2006 15:57:35 +0100 From: Martin Schwidefsky <schwidefsky@...ibm.com> To: linux-kernel@...r.kernel.org, heiko.carstens@...ibm.com Subject: [S390] Don't use small stacks when lockdep is used. From: Heiko Carstens <heiko.carstens@...ibm.com> [S390] Don't use small stacks when lockdep is used. The lock dependency validator adds a bunch of extra stack frames to the stack, which can cause stack overflows. Especially seen on 31 bit where the small stack is only 4k. Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com> --- arch/s390/Kconfig | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -urpN linux-2.6/arch/s390/Kconfig linux-2.6-patched/arch/s390/Kconfig --- linux-2.6/arch/s390/Kconfig 2006-12-04 14:50:32.000000000 +0100 +++ linux-2.6-patched/arch/s390/Kconfig 2006-12-04 14:51:07.000000000 +0100 @@ -178,7 +178,7 @@ config PACK_STACK config SMALL_STACK bool "Use 4kb/8kb for kernel stack instead of 8kb/16kb" - depends on PACK_STACK + depends on PACK_STACK && !LOCKDEP help If you say Y here and the compiler supports the -mkernel-backchain option the kernel will use a smaller kernel stack size. For 31 bit - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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