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authorMole Shang <[email protected]>2024-02-10 13:46:25 +0800
committerMole Shang <[email protected]>2024-02-10 13:50:34 +0800
commit3673a2cdfb30e1e3936e695a3fb8adee74488d6b (patch)
tree282b4677f47bbb15949e24b3bfa455b173a38a29 /kernel/kalloc.c
parentf379c1c4c80947365eb6c4046c3ab165629dc8cd (diff)
parentc9284cd93525436cc823258ab309c1b27eeec714 (diff)
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Merge branch 'pgtbl' into traps
Conflicts: .gitignore Makefile conf/lab.mk
Diffstat (limited to 'kernel/kalloc.c')
-rw-r--r--kernel/kalloc.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/kalloc.c b/kernel/kalloc.c
index 0699e7e..c2fdb86 100644
--- a/kernel/kalloc.c
+++ b/kernel/kalloc.c
@@ -80,3 +80,17 @@ kalloc(void)
memset((char*)r, 5, PGSIZE); // fill with junk
return (void*)r;
}
+
+int
+get_freemem(void)
+{
+ int n;
+ struct run *r;
+
+ acquire(&kmem.lock);
+ for (n = 0, r = kmem.freelist; r; r = r->next)
+ n++;
+ release(&kmem.lock);
+
+ return n * PGSIZE;
+}