Hi Dave,
Since we stop using dev_alloc_skb on the IrDA TX frame, we constantly run
into the case of the skb headroom being 0, and thus we call skb_cow for
every IrDA TX frame.
This patch uses a local buffer and memcpy the skb to it, saving us a
kmalloc for each of those IrDA TX frames.
Hi Dave,
On Wed, Jan 10, 2007 at 03:26:07PM -0800, David Miller wrote:
The warning is a bit extreme because the skb_cow() call does fix
things up and makes space available.
But it's not the most efficient thing in the world, so it's good
that we know about this so we can have a closer work.
From: Andreas Leitgeb [EMAIL PROTECTED]
Date: Sun, 7 Jan 2007 01:51:50 +0100
As soon as I load the irda-usb module with the device plugged,
I get lots of messages of following kind into the logs:
irda_usb_hard_xmit(), Insuficient skb headroom.
(the Insuficient-typo is original)
about 7 in
I'm not on this list, so please keep me CC'ed on this thread.
Since 2.6.19 I've got a problem with my Tekram IRmate 410U
usb-irda-dongle. Until 2.6.18.3 (the latest I had before 2.6.19*)
it worked just fine. 2.6.19.1 had another change in irda-usb
but that didn't solve the problem.
As soon as
