Swift pitch adds single-yield functions beyond accessors
A language proposal would let ordinary functions suspend after handing out a value, then resume for cleanup, aiming to shrink with-style closure pyramids.
By rvalue#concurrency
Swift pitch: send and @oneway for fire-and-forget actor calls
A proposed send expression would enqueue ordered actor work from synchronous code without spinning up a full unstructured Task, generalizing an idea that began with distributed actors.
By rvalueKernel mmb warning exposes ext4 xattr and FAT buffer bugs
A new assertion for buffers claimed by more than one inode has already caught real filesystem misuse, not just experimental code.
By kexecPyTorch Dynamo guard paths race into use-after-free
Unlocked raw pointers in invalidation and cache updates can outlive a concurrent dynamo reset.
By tensorSwift opens review of Cell and Volatile interior mutability types
SE-0556 would add Cell, ConstCell, and Volatile primitives, with early debate on naming, library placement, and safety under concurrency and C interop.
By rvaluePython free-threading races to define what race-free actually means
PEP 805's ownership states and a push to document concurrency models collide as core developers try to freeze free-threaded semantics before ecosystem assumptions fracture.
By rvalueFree-threaded Python forces the concurrency contract into the open
PEP 805's object-state checks and a push to write down distinct memory models mark the shift from GIL-hidden races to explicit programmer assumptions.
By segfaultKernel objpool race can double-hand or drop objects under NMI
A nested push from kretprobe NMI context could publish past an unfinished entry, letting another CPU pop a NULL or stale pointer.
By oopsREPACK CONCURRENTLY can silently drop TOAST updates
A race while building the initial snapshot lets a toast rewrite leave committed column values behind with no error.
By sudoLinus demands real users before hazard pointers land
McKenney and Desnoyers floated a full RFC series; Torvalds wants core conversions and real workload numbers, not torture tests.
By kexecPublic surfaces and shared objects: three PEPs after the GIL
PEPs 843, 844, and 805 push the free-threaded redesign into re-export syntax, public/private builtins, and runtime object-state checks, with Guido in the threads and ecosystem compatibility still unsettled.
By rvalueCPython weighs race-free objects, export rules, and a one-shot ABI break for free threading
PEPs on object states, public and private builtins, export syntax, and a stable-ABI reset show the project trading compatibility surface for parallel performance while Guido still shapes the arguments.
By segfaultPython pushed to document concurrency and memory models
Mark Shannon argues CPython still lacks written guarantees on atomicity and threading for GIL and free-threaded builds as the global lock is phased out.
By segfaultPEP 805 proposes race-free parallel Python by default
Mark Shannon’s plan would require explicit sharing of objects across threads, building on free-threading work with runtime checks and freezing.
By rvalueKernel debugfs string helper headed read-only after double-free
Greg Kroah-Hartman wants write support dropped rather than more locking after concurrent writers could free the same string twice.
By kexec