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authorMole Shang <[email protected]>2024-02-11 14:44:22 +0800
committerMole Shang <[email protected]>2024-02-11 16:06:15 +0800
commit2fe04bc8faa4bf737a86c36a8017473e84814f3b (patch)
tree2146d3dae86f21060e2e807ad364f5a949fd1c53 /kernel/kalloc.c
parent5ce1f630132d8b7b35b9dc46b4a55f860eb85d5c (diff)
parent48a5e34fcd07852b4a68825ce8e37feb6f6d04d7 (diff)
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Merge branch 'traps' into cow
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;
+}