On 2016-03-03 15:55, Johannes Berg wrote:

On Wed, 2016-02-24 at 10:29 +0100, Felix Fietkau wrote:

quoted

+	/*
+	 * If the rate is slower than single-stream MCS4, limit A-MSDU to usual
+	 * data packet size
+	 */
+	if (g->duration[rate] > MCS_DURATION(1, 0, 104))
+		return 1500;
+
+	/*
+	 * If the rate is slower than single-stream MCS7, limit A-MSDU to twice
+	 * the usual data packet size
+	 */
+	if (g->duration[rate] > MCS_DURATION(1, 0, 260))
+		return 3000;

This isn't *quite* right, since you have to take an 802.11 header (vs.
an ethernet header) into account, I think?

It's only a rough approximation anyway to prevent very large A-MSDUs
from being created with low rates.

- Felix