From: Xie He > Sent: 01 February 2021 16:15 > > On Mon, Feb 1, 2021 at 6:10 AM Julian Wiedmann <jwi@xxxxxxxxxxxxx> wrote: > > > > This sounds a bit like you want skb_cow_head() ... ? > > Calling "skb_cow_head" before we call "skb_clone" would indeed solve > the problem of writes to our clones affecting clones in other parts of > the system. But since we are still writing to the skb after > "skb_clone", it'd still be better to replace "skb_clone" with > "skb_copy" to avoid interference between our own clones. What is the fastest link lapb is actually used on these days? 64k used to be 'fast' - so copying the skb isn't going to have a noticeable effect on system performance. We did once get a 'free' upgrade of our X.25 link from 2400 to 9600. Probably due to the power consumption and rack space needed for the older modem. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
