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[kernel] Fix page_tree growth bug

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The logic was inverted in contains(), meaning that new parents were
never being created, and the same level-0 block was just getting reused.
This commit is contained in:
Justin C. Miller
2021-02-05 23:47:29 -08:00
parent c87563a520
commit 335bc01185
1 changed files with 1 additions and 1 deletions
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src/kernel/page_tree.cpp
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@@ -44,7 +44,7 @@ inline bool contains(uint64_t page_off, uint64_t word, uint8_t &index) {
uint64_t base = to_base(word); uint64_t base = to_base(word);
uint64_t bits = to_level(word) * bits_per_level; uint64_t bits = to_level(word) * bits_per_level;
index = (page_off >> bits) & 0x3f; index = (page_off >> bits) & 0x3f;
return (page_off & (~0x3full << bits)) != base; return (page_off & (~0x3full << bits)) == base;
} }
inline uint64_t index_for(uint64_t page_off, uint8_t level) { inline uint64_t index_for(uint64_t page_off, uint8_t level) {