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docs:mm: fixed spelling and grammar mistakes on vmalloc kernel stack page

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Signed-off-by: Dennis Lam <dennis.lamerice@gmail.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20240906204914.42698-2-dennis.lamerice@gmail.com>
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Dennis Lam 2024-09-06 16:49:13 -04:00 committed by Jonathan Corbet
parent e6ba83cb81
commit bf78b46683
1 changed files with 4 additions and 4 deletions
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8
Documentation/mm/vmalloced-kernel-stacks.rst
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@ -110,7 +110,7 @@ Bulk of the code is in:
`kernel/fork.c <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/kernel/fork.c>`. `kernel/fork.c <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/kernel/fork.c>`.
stack_vm_area pointer in task_struct keeps track of the virtually allocated stack_vm_area pointer in task_struct keeps track of the virtually allocated
stack and a non-null stack_vm_area pointer serves as a indication that the stack and a non-null stack_vm_area pointer serves as an indication that the
virtually mapped kernel stacks are enabled. virtually mapped kernel stacks are enabled.
:: ::
@ -120,8 +120,8 @@ virtually mapped kernel stacks are enabled.
Stack overflow handling Stack overflow handling
----------------------- -----------------------
Leading and trailing guard pages help detect stack overflows. When stack Leading and trailing guard pages help detect stack overflows. When the stack
overflows into the guard pages, handlers have to be careful not overflow overflows into the guard pages, handlers have to be careful not to overflow
the stack again. When handlers are called, it is likely that very little the stack again. When handlers are called, it is likely that very little
stack space is left. stack space is left.
@ -148,6 +148,6 @@ Conclusions
- THREAD_INFO_IN_TASK gets rid of arch-specific thread_info entirely and - THREAD_INFO_IN_TASK gets rid of arch-specific thread_info entirely and
simply embed the thread_info (containing only flags) and 'int cpu' into simply embed the thread_info (containing only flags) and 'int cpu' into
task_struct. task_struct.
- The thread stack can be free'ed as soon as the task is dead (without - The thread stack can be freed as soon as the task is dead (without
waiting for RCU) and then, if vmapped stacks are in use, cache the waiting for RCU) and then, if vmapped stacks are in use, cache the
entire stack for reuse on the same cpu. entire stack for reuse on the same cpu.