diff options
-rw-r--r-- | vm.c | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -261,7 +261,9 @@ deallocuvm(pde_t *pgdir, uint oldsz, uint newsz) a = PGROUNDUP(newsz); for(; a < oldsz; a += PGSIZE){ pte = walkpgdir(pgdir, (char*)a, 0); - if(pte && (*pte & PTE_P) != 0){ + if(!pte) + a += (NPTENTRIES - 1) * PGSIZE; + else if((*pte & PTE_P) != 0){ pa = PTE_ADDR(*pte); if(pa == 0) panic("kfree"); |