From: Vakul Garg <vakul.g...@nxp.com> Date: Wed, 16 Jan 2019 01:42:44 +0000
> Function sk_msg_clone has been modified to merge the data from source sg > entry to destination sg entry if the cloned data resides in same page > and is contiguous to the end entry of destination sk_msg. This improves > kernel tls throughput to the tune of 10%. > > When the user space tls application calls sendmsg() with MSG_MORE, it leads > to calling sk_msg_clone() with new data being cloned placed continuous to > previously cloned data. Without this optimization, a new SG entry in > the destination sk_msg i.e. rec->msg_plaintext in tls_clone_plaintext_msg() > gets used. This leads to exhaustion of sg entries in rec->msg_plaintext > even before a full 16K of allowable record data is accumulated. Hence we > lose oppurtunity to encrypt and send a full 16K record. > > With this patch, the kernel tls can accumulate full 16K of record data > irrespective of the size of data passed in sendmsg() with MSG_MORE. > > Signed-off-by: Vakul Garg <vakul.g...@nxp.com> Applied.
