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From: Robert Watson <rwatson@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
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Subject: PERFORCE change 137398 for review
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http://perforce.freebsd.org/chv.cgi?CH=137398

Change 137398 by rwatson@rwatson_cinnamon on 2008/03/11 14:33:23

	Comment for zrotbuf.

Affected files ...

.. //depot/projects/zcopybpf/src/sys/net/bpf_zerocopy.c#30 edit

Differences ...

==== //depot/projects/zcopybpf/src/sys/net/bpf_zerocopy.c#30 (text+ko) ====

@@ -414,6 +414,11 @@
 	return (0);
 }
 
+/*
+ * Ioctl to force rotation of the two buffers, if there's any data available.
+ * This can be used by user space to implement time outs when waiting for a
+ * buffer to fill.
+ */
 int
 bpf_zerocopy_ioctl_rotzbuf(struct thread *td, struct bpf_d *d,
     struct bpf_zbuf *bz)