On Fri, Jan 15, 2021 at 12:55 AM Alexander Lobakin <[email protected]> wrote: > > Commit 3226b158e67c ("net: avoid 32 x truesize under-estimation for > tiny skbs") ensured that skbs with data size lower than 1025 bytes > will be kmalloc'ed to avoid excessive page cache fragmentation and > memory consumption. > However, the same issue can still be achieved manually via > __netdev_alloc_skb(), where the check for size hasn't been changed. > Mirror the condition from __napi_alloc_skb() to prevent from that. > > Fixes: 3226b158e67c ("net: avoid 32 x truesize under-estimation for tiny > skbs")
No, this tag is wrong, if you fix a bug, bug is much older than linux-5.11 My fix was about GRO head and virtio_net heads, both using pre-sized small buffers. You want to fix something else, and this is fine, because some drivers are unfortunately doing copy break ( at the cost of additional copy, even for packets that might be consumed right away)
