Messages in this thread Patch in this message | | | From | Mingzhe Yang <> | Subject | [PATCH] Documentation: x86: update the thread_info's position | Date | Sat, 5 Dec 2020 13:01:36 +0800 |
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Prior to kernel 4.9 the thread_info structure was at the bottom of the kernel stack. kernel 4.9 moved it into the task_struct.
See commits c65eacb ("sched/core: Allow putting thread_info into task_struct"), 15f4eae ("x86: Move thread_info into task_struct") and 883d50f ("scripts/gdb: fix get_thread_info").
Signed-off-by: Mingzhe Yang <cainiao666999@gmail.com> --- Documentation/x86/kernel-stacks.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/Documentation/x86/kernel-stacks.rst b/Documentation/x86/kernel-stacks.rst index 6b0bcf0..e9097f3 100644 --- a/Documentation/x86/kernel-stacks.rst +++ b/Documentation/x86/kernel-stacks.rst @@ -15,7 +15,8 @@ Like all other architectures, x86_64 has a kernel stack for every active thread. These thread stacks are THREAD_SIZE (2*PAGE_SIZE) big. 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. +except for the thread_info structure at the bottom (since kernel 4.9, +the thread_info structure has been moved into task_struct). In addition to the per thread stacks, there are specialized stacks associated with each CPU. These stacks are only used while the kernel -- 1.8.3.1
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