A comment about gc_delayed on iget race

75c0ef4a · Silas Boyd-Wickizer · d8aa6e10 · 75c0ef4a
--- a/kernel/fs.cc
+++ b/kernel/fs.cc
@@ -285,6 +285,8 @@ iget(u32 dev, u32 inum)
  ip->readbusy = 1;
  if (ins->insert(make_pair(ip->dev, ip->inum), ip) < 0) {
+    // We haven't touched anything on disk, so we can
+    // gc_delayed, instead of ip->onzero() (via ip->dec())
    gc_delayed(ip);
    goto retry;
  }