Date: Tue, 27 Aug 2019 01:16:03 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351524 - head/sys/dev/cxgbe/tom Message-ID: <201908270116.x7R1G37I098315@repo.freebsd.org>
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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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