mirror of
https://github.com/LineageOS/android_kernel_samsung_msm8226.git
synced 2026-09-28 00:00:22 +02:00
Felix Fietkau
786ba07488
At the beginning of __skb_cow, headroom gets set to a minimum of NET_SKB_PAD. This causes unnecessary reallocations if the buffer was not cloned and the headroom is just below NET_SKB_PAD, but still more than the amount requested by the caller. This was showing up frequently in my tests on VLAN tx, where vlan_insert_tag calls skb_cow_head(skb, VLAN_HLEN). Locally generated packets should have enough headroom, and for forward paths, we already have NET_SKB_PAD bytes of headroom, so we don't need to add any extra space here. Change-Id: I3d596f0f856fc6ed992193cad1628fa8194cd699 Git-commit: 617c8c11236716dcbda877e764b7bf37c6fd8063 Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>