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Merged
nascheme merged 10 commits into from
Jun 23, 2025
Merged

gh-119786: Add InternalDocs/qsbr.md. #135411

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ccea600
Add InternalDocs/qsbr.md.
nascheme Jun 11, 2025
def9494
Update InternalDocs/qsbr.md
nascheme Jun 13, 2025
b192609
Update InternalDocs/qsbr.md
nascheme Jun 13, 2025
19c0efa
Update InternalDocs/qsbr.md
nascheme Jun 20, 2025
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Update InternalDocs/qsbr.md
nascheme Jun 20, 2025
25b7140
Fix goal compare condition, format tweaks.
nascheme Jun 20, 2025
b313c1e
Merge 'origin/main' into qsbr-internal-doc
nascheme Jun 20, 2025
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Formatting adjustment based on review.
nascheme Jun 23, 2025
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nascheme Jun 23, 2025
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Merge branch 'main' into qsbr-internal-doc
nascheme Jun 23, 2025
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@nascheme
nascheme committed Jun 23, 2025
commit 7b08578e7973b924a85362002f9c85e48719557c
6 changes: 3 additions & 3 deletions InternalDocs/qsbr.md
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Expand Up @@ -58,13 +58,13 @@ page or return its memory to the OS.

### Core Implementation

The proposal to add QSBR to Python is contained in [Github issue 115103]
(https://github.com/python/cpython/issues/115103).
The proposal to add QSBR to Python is contained in
[Github issue 115103](https://github.com/python/cpython/issues/115103).
Many details of that proposal have been copied here, so they can be kept
up-to-date with the actual implementation.

Python's QSBR implementation is based on FreeBSD's "Global Unbounded
Sequences." [^1, ^2, ^3]. It relies on a few key counters:
Sequences." [^1][^2][^3]. It relies on a few key counters:

* Global Write Sequence (`wr_seq`): A per-interpreter counter, `wr_seq`, is started
at 1 and incremented by 2 each time it is advanced. This ensures its value is
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