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yet another sbrk() bug fix, and usertest

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This commit is contained in:
Robert Morris 2019-09-20 12:13:57 -04:00
parent 4de161f973
commit e1a37303c8
2 changed files with 24 additions and 4 deletions
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3
kernel/vm.c
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@ -270,7 +270,8 @@ uvmdealloc(pagetable_t pagetable, uint64 oldsz, uint64 newsz)
return oldsz;
uint64 newup = PGROUNDUP(newsz);
uvmunmap(pagetable, newup, oldsz - newup, 1);
if(newup < PGROUNDUP(oldsz))
uvmunmap(pagetable, newup, oldsz - newup, 1);
return newsz;
}