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authorChristoph Hellwig <hch@lst.de>2010-06-28 14:15:54 +0200
committerThomas Gleixner <tglx@linutronix.de>2010-06-29 12:12:59 +0200
commit7974891db234467eaf1fec613ec0129cb4ac2332 (patch)
tree09de403e54e39f4f25a1c15a29f5b201d4c11729 /arch/x86/Kconfig.debug
parentMerge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/ker... (diff)
downloadlinux-7974891db234467eaf1fec613ec0129cb4ac2332.tar.xz
linux-7974891db234467eaf1fec613ec0129cb4ac2332.zip
x86: Always use irq stacks
IRQ stacks provide much better safety against unexpected stack use from interrupts, at the minimal downside of slightly higher memory usage. Enable irq stacks also for the default 8k stack on 32-bit kernels to minimize the problem of stack overflows through interrupt activity. This is what the 64-bit kernel and various other architectures already do. Signed-off-by: Christoph Hellwig <hch@lst.de> LKML-Reference: <20100628121554.GA6605@lst.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/Kconfig.debug')
-rw-r--r--arch/x86/Kconfig.debug3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 75085080b63e..badda8e20e78 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -128,8 +128,7 @@ config 4KSTACKS
If you say Y here the kernel will use a 4Kb stacksize for the
kernel stack attached to each process/thread. This facilitates
running more threads on a system and also reduces the pressure
- on the VM subsystem for higher order allocations. This option
- will also use IRQ stacks to compensate for the reduced stackspace.
+ on the VM subsystem for higher order allocations.
config DOUBLEFAULT
default y