On Mon, Oct 30, 2023 at 06:03:43PM +0100, Gerd Bayer wrote:
>Since commit 833bac7ec392 ("net/smc: Fix setsockopt and sysctl to
>specify same buffer size again") the SMC protocol uses its own
>default values for the smc.rmem and smc.wmem sysctl variables
>which are no longer derived from the TCP IPv4 buffer sizes.
>
>Fixup the kernel documentation to reflect this change, too.
>
>Fixes: 833bac7ec392 ("net/smc: Fix setsockopt and sysctl to specify same buffer size again")
>Signed-off-by: Gerd Bayer <gbayer@xxxxxxxxxxxxx>
>Reviewed-by: Wenjia Zhang <wenjia@xxxxxxxxxxxxx>
Reviewed-by: Dust Li <dust.li@xxxxxxxxxxxxxxxxx>
>---
> Documentation/networking/smc-sysctl.rst | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
>diff --git a/Documentation/networking/smc-sysctl.rst b/Documentation/networking/smc-sysctl.rst
>index 6d8acdbe9be1..769149d98773 100644
>--- a/Documentation/networking/smc-sysctl.rst
>+++ b/Documentation/networking/smc-sysctl.rst
>@@ -44,18 +44,16 @@ smcr_testlink_time - INTEGER
>
> wmem - INTEGER
> Initial size of send buffer used by SMC sockets.
>- The default value inherits from net.ipv4.tcp_wmem[1].
>
> The minimum value is 16KiB and there is no hard limit for max value, but
> only allowed 512KiB for SMC-R and 1MiB for SMC-D.
>
>- Default: 16K
>+ Default: 64KiB
>
> rmem - INTEGER
> Initial size of receive buffer (RMB) used by SMC sockets.
>- The default value inherits from net.ipv4.tcp_rmem[1].
>
> The minimum value is 16KiB and there is no hard limit for max value, but
> only allowed 512KiB for SMC-R and 1MiB for SMC-D.
>
>- Default: 128K
>+ Default: 64KiB
>--
>2.41.0
