[$] Fixing the TCMalloc regression with RSEQ operations
The restartable sequences feature is one of the stranger corners of the kernel's user-space interface; it provides a way for user space to carry out simple lockless operations and be informed if it is preempted over the course of an operation (and must, thus, restart). Work merged in the 6.19 release to improve the performance of restartable sequences broke the TCMalloc allocator , which was…
We haven't written up this one. LWN has the full story — the link below goes straight to it.
