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authorVito Caputo <vcaputo@pengaru.com>2021-02-18 03:12:25 -0800
committerVito Caputo <vcaputo@pengaru.com>2021-02-18 03:36:37 -0800
commit0536326f814739a4ee6136f4156431e77fe45769 (patch)
treee911431e878f2fa0ee6f102bfdc10cfe1202c2cb /src/modules/drizzle
parent561bc18c2ff6ba42d4640eccb097b7f4bc8fecc3 (diff)
fb: make inactive pages list doubly-linked
This introduces a previous pointer to _fb_page_t, but it's only used on the inactive list. This is a preparatory commit to facilitate adding inactive pages at the head and consuming inactive pages off the tail, without having to always iterate the list for the new tail. Rebuilding pages on resize needs to happen somewhere, and the inactive list seems like the right place to do it. And to do it with a simple per-fb pages-needing-rebuild counter requires turning the inactive list into a FIFO queue.
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