Rollover

Posted Oct 12, 2022 16:46 UTC (Wed) by surenb (guest, #114881)
In reply to: Rollover by corbet
Parent article: Concurrent page-fault handling with per-VMA locks

Mr Corbet is right as usual. The comment in https://lwn.net/ml/linux-kernel/c84136d3-703a-0e57-20ce-5... indicates " Overflow might produce false locked result but it's not critical.". This is because we will simply fallback to taking mmap_lock in the case of the false positive. Per Laurent's comment I'm going to expand this comment to explain the details.