https://bugzilla.kernel.org/show_bug.cgi?id=214661 Bug ID: 214661 Summary: THREAD_SIZE on x86_64 is 4*PAGE_SIZE, not 2*PAGE_SIZE Product: Documentation Version: unspecified Hardware: All OS: Linux Status: NEW Severity: normal Priority: P1 Component: man-pages Assignee: documentation_man-pages@xxxxxxxxxxxxxxxxxxxx Reporter: me@xxxxxxxxxx Regression: No According to '/root/linux/arch/x86/include/asm/page_64_types.h', THREAD_SIZE on x86_64 now is 4*PAGE_SIZE: #ifdef CONFIG_KASAN #define KASAN_STACK_ORDER 1 #else #define KASAN_STACK_ORDER 0 #endif #define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER) #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) However, the Documentation/x86/kernel-stacks.rst shows that THREAD_SIZE on x86_64 is 2*PAGE_SIZE: Like all other architectures, x86_64 has a kernel stack for every active thread. These thread stacks are THREAD_SIZE (2*PAGE_SIZE) big. I am not quite sure which is correct, Maybe the document needs an upgrade? Thanks a lot for any reply. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
