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| author | David Howells <[email protected]> | 2016-09-21 23:29:31 +0000 |
|---|---|---|
| committer | David Howells <[email protected]> | 2016-09-22 07:21:24 +0000 |
| commit | 50235c4b5a2fb9a9690f02cd1dea6ca047d7f79e (patch) | |
| tree | 3dc5a178820b16d5eaef0484fe7751cb4f71375e /drivers/net/xen-netback/interface.c | |
| parent | rxrpc: Add ktime_sub_ms() (diff) | |
| download | kernel-50235c4b5a2fb9a9690f02cd1dea6ca047d7f79e.tar.gz kernel-50235c4b5a2fb9a9690f02cd1dea6ca047d7f79e.zip | |
rxrpc: Obtain RTT data by requesting ACKs on DATA packets
In addition to sending a PING ACK to gain RTT data, we can set the
RXRPC_REQUEST_ACK flag on a DATA packet and get a REQUESTED-ACK ACK. The
ACK packet contains the serial number of the packet it is in response to,
so we can look through the Tx buffer for a matching DATA packet.
This requires that the data packets be stamped with the time of
transmission as a ktime rather than having the resend_at time in jiffies.
This further requires the resend code to do the resend determination in
ktimes and convert to jiffies to set the timer.
Signed-off-by: David Howells <[email protected]>
Diffstat (limited to 'drivers/net/xen-netback/interface.c')
0 files changed, 0 insertions, 0 deletions