CONFIG_SWAP_SMALL with refcount max 8?

Posted Apr 7, 2025 19:08 UTC (Mon) by willy (subscriber, #9762)
In reply to: CONFIG_SWAP_SMALL with refcount max 8? by k3ninho
Parent article: Three ways to rework the swap subsystem

If there are more than 63 references to a swap page, another page full of bytes is allocated to store the high bits. After 4095, a third page is allocated, and so on.

Yes, this is stupid. No, it rarely happens.