Commit 4e485d06 authored by Vakul Garg's avatar Vakul Garg Committed by David S. Miller

strparser: Call skb_unclone conditionally

Calling skb_unclone() is expensive as it triggers a memcpy operation.
Instead of calling skb_unclone() unconditionally, call it only when skb
has a shared frag_list. This improves tls rx throughout significantly.
Signed-off-by: default avatarVakul Garg <vakul.garg@nxp.com>
Suggested-by: default avatarBoris Pismenny <borisp@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 180390c4
......@@ -155,11 +155,13 @@ static int __strp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
/* We are going to append to the frags_list of head.
* Need to unshare the frag_list.
*/
err = skb_unclone(head, GFP_ATOMIC);
if (err) {
STRP_STATS_INCR(strp->stats.mem_fail);
desc->error = err;
return 0;
if (skb_has_frag_list(head)) {
err = skb_unclone(head, GFP_ATOMIC);
if (err) {
STRP_STATS_INCR(strp->stats.mem_fail);
desc->error = err;
return 0;
}
}
if (unlikely(skb_shinfo(head)->frag_list)) {
......@@ -216,14 +218,16 @@ static int __strp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb,
memset(stm, 0, sizeof(*stm));
stm->strp.offset = orig_offset + eaten;
} else {
/* Unclone since we may be appending to an skb that we
/* Unclone if we are appending to an skb that we
* already share a frag_list with.
*/
err = skb_unclone(skb, GFP_ATOMIC);
if (err) {
STRP_STATS_INCR(strp->stats.mem_fail);
desc->error = err;
break;
if (skb_has_frag_list(skb)) {
err = skb_unclone(skb, GFP_ATOMIC);
if (err) {
STRP_STATS_INCR(strp->stats.mem_fail);
desc->error = err;
break;
}
}
stm = _strp_msg(head);
......
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