current information about THREAD_SIZE value is obsoleted. This patch fixes this.
Signed-off-by: Alexander Kuleshov <kuleshovm...@gmail.com> --- Documentation/x86/kernel-stacks | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Documentation/x86/kernel-stacks b/Documentation/x86/kernel-stacks index 9a0aa4d..f4b4197 100644 --- a/Documentation/x86/kernel-stacks +++ b/Documentation/x86/kernel-stacks @@ -6,7 +6,8 @@ Most of the text from Keith Owens, hacked by AK x86_64 page size (PAGE_SIZE) is 4K. Like all other architectures, x86_64 has a kernel stack for every -active thread. These thread stacks are THREAD_SIZE (2*PAGE_SIZE) big. +active thread. These thread stacks are THREAD_SIZE (PAGE_SIZE << 2) +or (PAGE_SIZE << 3) if the CONFIG_KASAN is enabled. These stacks contain useful data as long as a thread is alive or a zombie. While the thread is in user space the kernel stack is empty except for the thread_info structure at the bottom. -- 2.8.0.rc3.1353.gea9bdc0
