ruby-core

Issue #15095 has been updated by ko1 (Koichi Sasada).


> ec->vm_stack is always allocated with malloc, so stacks for root
> fiber (thread stack) and non-root fibers can be shared as long
> as the size is the same.

I'm not sure why we can share the VM stack. If we run root fiber and non-root fiber with switching, it will conflicts.
Do I misunderstand something?


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Feature #15095: [PATCH] share VM stack between threads and fibers if identical
https://bugs.ruby-lang.org/issues/15095#change-73961

* Author: normalperson (Eric Wong)
* Status: Open
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* Target version: 
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ec->vm_stack is always allocated with malloc, so stacks for root
fiber (thread stack) and non-root fibers can be shared as long
as the size is the same.  The purpose of this change was mainly
to reduce dependencies on ROOT_FIBER_CONTEXT, but it makes sense
to share reusable data as much as possible, regardless.

Will commit in a day or two (part of plan for [Bug #15050]).
Long term, I think it makes sense to get rid of distinction
between "thread" and "fiber" stacks, because every thread
has a (root) fiber, anyways.


---Files--------------------------------
0001-share-VM-stack-between-threads-and-fibers-if-identic.patch (4.15 KB)


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