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page cache: proper truncation

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Matheus
2026-08-20 22:36:38 -03:00
parent 31f9ae17cf
commit 7217a1e258
9 changed files with 170 additions and 58 deletions
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kernel-src/mm/range.c
+2 -2
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@@ -165,7 +165,7 @@ void mm_destroy_range(mm_range_t *range, uintmax_t _offset, size_t size, int fla
} else if (arch_mmu_iswritable(current_mm_context()->pagetable, vaddr)) {
// dirty page cache mapping
arch_mmu_unmap(current_mm_context()->pagetable, vaddr);
mm_cache_make_dirty(mm_get_page(physical));
mm_cache_make_dirty(range->vnode, mm_get_page(physical));
mm_release_page(physical);
} else {
// non dirty page mapping
@@ -210,7 +210,7 @@ static void change_mmu_range(mm_range_t *range, void *base, size_t size, mmuflag
// removing write permissions from a writeable dirty shared mapped page, mark it as dirty, as
// it won't be marked dirty upon a mm_unmap after this
page_t *page = mm_get_page(physical);
mm_cache_make_dirty(page);
mm_cache_make_dirty(range->vnode, page);
}
// we will only change the mapping if the permissions decreased