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authorWen Gu <guwen@linux.alibaba.com>2022-07-14 12:44:02 +0300
committerDavid S. Miller <davem@davemloft.net>2022-07-18 13:19:17 +0300
commit4bc5008e4387106215b50ae1a4ac2467455725ca (patch)
treea4cae8948e6682f0f02f167f7b7d17799f84c025 /net/smc
parent0ef69e788411cba2af017db731a9fc62d255e9ac (diff)
downloadlinux-4bc5008e4387106215b50ae1a4ac2467455725ca.tar.xz
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 <guwen@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc')
-rw-r--r--net/smc/smc_core.h6
-rw-r--r--net/smc/smc_sysctl.c11
2 files changed, 17 insertions, 0 deletions
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 <net/net_namespace.h>
#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;