Files
linux/net/smc/smc_sysctl.h
Halil Pasic aef3cdb47b net/smc: make wr buffer count configurable
Think SMC_WR_BUF_CNT_SEND := SMC_WR_BUF_CNT used in send context and
SMC_WR_BUF_CNT_RECV := 3 * SMC_WR_BUF_CNT used in recv context. Those
get replaced with lgr->max_send_wr and lgr->max_recv_wr respective.

Please note that although with the default sysctl values
qp_attr.cap.max_send_wr ==  qp_attr.cap.max_recv_wr is maintained but
can not be assumed to be generally true any more. I see no downside to
that, but my confidence level is rather modest.

Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Sidraya Jayagond <sidraya@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Tested-by: Mahanta Jambigi <mjambigi@linux.ibm.com>
Link: https://patch.msgid.link/20251027224856.2970019-2-pasic@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-10-30 13:31:43 +01:00

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C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Shared Memory Communications over RDMA (SMC-R) and RoCE
*
* smc_sysctl.c: sysctl interface to SMC subsystem.
*
* Copyright (c) 2022, Alibaba Inc.
*
* Author: Tony Lu <tonylu@linux.alibaba.com>
*
*/
#ifndef _SMC_SYSCTL_H
#define _SMC_SYSCTL_H
#ifdef CONFIG_SYSCTL
int __net_init smc_sysctl_net_init(struct net *net);
void __net_exit smc_sysctl_net_exit(struct net *net);
#else
static inline int smc_sysctl_net_init(struct net *net)
{
net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
net->smc.sysctl_max_links_per_lgr = SMC_LINKS_PER_LGR_MAX_PREFER;
net->smc.sysctl_max_conns_per_lgr = SMC_CONN_PER_LGR_PREFER;
net->smc.sysctl_smcr_max_send_wr = SMCR_MAX_SEND_WR_DEF;
net->smc.sysctl_smcr_max_recv_wr = SMCR_MAX_RECV_WR_DEF;
return 0;
}
static inline void smc_sysctl_net_exit(struct net *net) { }
#endif /* CONFIG_SYSCTL */
#endif /* _SMC_SYSCTL_H */