Messages in this thread | | | Date | Wed, 22 Aug 2012 16:33:21 -0500 | From | Larry Finger <> | Subject | Re: Regression associated with commit c8628155ece3 - "tcp: reduce out_of_order memory use" |
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On 08/22/2012 12:15 AM, Eric Dumazet wrote: > > This particular commit is the start of a patches batch that ended in the > generic TCP coalescing mechanism. > > It is known to have problem on drivers doing skb_clone() in their rx > path. > > Current kernels should be ok, because coalescing doesnt happen if the > destination skb is cloned (skb_cloned(to) in skb_try_coalesce())
The skb_clone() call is not the source of the problem for r8712u, as it is only used when a memory allocation fails, which is not happening. The suggestion did lead to another patch that I had been preparing. The initial allocation of RX buffers used a size of 30720 bytes, while 9100 is sufficient to allow aggregation. Upon reducing the buffer size, the driver now works for me. I am now awaiting tests by the OP on the Red Hat bugzilla before sending the patch upstream.
So far, no ideas for the problem in connecting to WPA1 networks.
Larry
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