SMC Sysctl

/proc/sys/net/smc/* Variables

smcr_buf_type - INTEGER

Controls which type of sndbufs and RMBs to use in later newly created SMC-R link group. Only for SMC-R.

Default: 0 (physically contiguous sndbufs and RMBs)

Possible values:

  • 0 - Use physically contiguous buffers

  • 1 - Use virtually contiguous buffers

  • 2 - Mixed use of the two types. Try physically contiguous buffers first. If not available, use virtually contiguous buffers then.

wmem - INTEGER

Initial size of send buffer used by SMC sockets.

The minimum value is 16KiB and there is no hard limit for max value, but only allowed 512KiB for SMC-R using physically contiguous buffers, 256MiB for SMC-R using other buf type and 1MiB for SMC-D.

Default: 64KiB

rmem - INTEGER

Initial size of receive buffer (RMB) used by SMC sockets.

The minimum value is 16KiB and there is no hard limit for max value, but only allowed 512KiB for SMC-R using physically contiguous buffers, 256MiB for SMC-R using other buf type and 1MiB for SMC-D.

Default: 64KiB