Author: np
Date: Tue Aug 27 01:16:02 2019
New Revision: 351524
URL: https://svnweb.freebsd.org/changeset/base/351524
Log:
cxgbe/t4_tom: Limit work requests with immediate payload to a single
descriptor. The per-tid tx credits are in demand during active Tx and
it's best not to use too many just for payload.
Sponsored by: Chelsio Communications
Modified:
head/sys/dev/cxgbe/tom/t4_cpl_io.c
Modified: head/sys/dev/cxgbe/tom/t4_cpl_io.c
==============================================================================
--- head/sys/dev/cxgbe/tom/t4_cpl_io.c Tue Aug 27 00:29:30 2019
(r351523)
+++ head/sys/dev/cxgbe/tom/t4_cpl_io.c Tue Aug 27 01:16:02 2019
(r351524)
@@ -540,7 +540,7 @@ t4_close_conn(struct adapter *sc, struct toepcb *toep)
static inline int
max_imm_payload(int tx_credits)
{
- const int n = 2; /* Use only up to 2 desc for imm. data WR */
+ const int n = 1; /* Use no more than one desc for imm. data WR */
KASSERT(tx_credits >= 0 &&
tx_credits <= MAX_OFLD_TX_CREDITS,
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