Linux 6.19 Slated To Land "mm/cid" Rewrite That Has Very Positive Performance Potential

Posted by bob on Nov 21, 2025 2:23 PM EDT
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A set of Linux kernel patches posted back in October for rewriting the kernel's memory-mapped concurrency ID code for some nice performance wins looks like it will land for Linux 6.19. This is the code that prominent Intel engineer Thomas Gleixner found to yield up to an 18% improvement for the PostgreSQL database. My testing of this "mm/cid" code has also shown some nice performance wins too...

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