Imbus/xv6-riscv-kernel
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complain if no disk 1

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lots of cleanup
This commit is contained in:
rtm 2006-08-30 18:55:06 +00:00
parent 18432ed5ed
commit 2aa4c3bc29
10 changed files with 35 additions and 122 deletions
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45
kalloc.c
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@ -23,8 +23,6 @@ struct run {
};
struct run *freelist;
void ktest(void);
/*
* initialize free list of physical pages. this code
* cheats by just considering the one megabyte of pages
@ -43,7 +41,6 @@ kinit(void)
mem = 256; // XXX
cprintf("mem = %d\n", mem * PAGE);
kfree(start, mem * PAGE);
ktest();
}
void
@ -130,46 +127,6 @@ kalloc(int n)
rr = &(*rr)->next;
}
release(&kalloc_lock);
cprintf("kalloc: out of memory\n");
return 0;
}
void
ktest(void)
{
char *p1, *p2, *p3;
// test coalescing
p1 = kalloc(4 * PAGE);
kfree(p1 + 3*PAGE, PAGE);
kfree(p1 + 2*PAGE, PAGE);
kfree(p1, PAGE);
kfree(p1 + PAGE, PAGE);
p2 = kalloc(4 * PAGE);
if(p2 != p1)
panic("ktest");
kfree(p2, 4 * PAGE);
// test finding first run that fits
p1 = kalloc(1 * PAGE);
p2 = kalloc(1 * PAGE);
kfree(p1, PAGE);
p3 = kalloc(2 * PAGE);
kfree(p2, PAGE);
kfree(p3, 2 * PAGE);
// test running out of memory
p1 = 0;
while((p2 = kalloc(PAGE)) != 0){
*(char**)p2 = p1;
p1 = p2;
}
while(p1){
p2 = *(char **)p1;
kfree(p1, PAGE);
p1 = p2;
}
p1 = kalloc(PAGE * 20);
if(p1 == 0)
panic("ktest2");
kfree(p1, PAGE * 20);
}