From 4bc5008e4387106215b50ae1a4ac2467455725ca Mon Sep 17 00:00:00 2001 From: Wen Gu Date: Thu, 14 Jul 2022 17:44:02 +0800 Subject: net/smc: Introduce a sysctl for setting SMC-R buffer type This patch introduces the sysctl smcr_buf_type for setting the type of SMC-R sndbufs and RMBs. Valid values includes: - SMCR_PHYS_CONT_BUFS, which means use physically contiguous buffers for better performance and is the default value. - SMCR_VIRT_CONT_BUFS, which means use virtually contiguous buffers in case of physically contiguous memory is scarce. - SMCR_MIXED_BUFS, which means first try to use physically contiguous buffers. If not available, then use virtually contiguous buffers. Signed-off-by: Wen Gu Signed-off-by: David S. Miller --- net/smc/smc_core.h | 6 ++++++ net/smc/smc_sysctl.c | 11 +++++++++++ 2 files changed, 17 insertions(+) (limited to 'net/smc') diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index 46ddec5f1edc..7652dfa783ff 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -217,6 +217,12 @@ enum smc_lgr_type { /* redundancy state of lgr */ SMC_LGR_ASYMMETRIC_LOCAL, /* local has 1, peer 2 active RNICs */ }; +enum smcr_buf_type { /* types of SMC-R sndbufs and RMBs */ + SMCR_PHYS_CONT_BUFS = 0, + SMCR_VIRT_CONT_BUFS = 1, + SMCR_MIXED_BUFS = 2, +}; + enum smc_llc_flowtype { SMC_LLC_FLOW_NONE = 0, SMC_LLC_FLOW_ADD_LINK = 2, diff --git a/net/smc/smc_sysctl.c b/net/smc/smc_sysctl.c index cf3ab1334c00..0613868fdb97 100644 --- a/net/smc/smc_sysctl.c +++ b/net/smc/smc_sysctl.c @@ -15,6 +15,7 @@ #include #include "smc.h" +#include "smc_core.h" #include "smc_sysctl.h" static struct ctl_table smc_table[] = { @@ -25,6 +26,15 @@ static struct ctl_table smc_table[] = { .mode = 0644, .proc_handler = proc_douintvec, }, + { + .procname = "smcr_buf_type", + .data = &init_net.smc.sysctl_smcr_buf_type, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_douintvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_TWO, + }, { } }; @@ -49,6 +59,7 @@ int __net_init smc_sysctl_net_init(struct net *net) goto err_reg; net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE; + net->smc.sysctl_smcr_buf_type = SMCR_PHYS_CONT_BUFS; return 0; -- cgit v1.2.3