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4bc5008e43
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>
36 lines
1.2 KiB
ReStructuredText
36 lines
1.2 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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==========
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SMC Sysctl
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==========
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/proc/sys/net/smc/* Variables
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=============================
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autocorking_size - INTEGER
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Setting SMC auto corking size:
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SMC auto corking is like TCP auto corking from the application's
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perspective of view. When applications do consecutive small
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write()/sendmsg() system calls, we try to coalesce these small writes
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as much as possible, to lower total amount of CDC and RDMA Write been
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sent.
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autocorking_size limits the maximum corked bytes that can be sent to
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the under device in 1 single sending. If set to 0, the SMC auto corking
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is disabled.
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Applications can still use TCP_CORK for optimal behavior when they
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know how/when to uncork their sockets.
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Default: 64K
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smcr_buf_type - INTEGER
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Controls which type of sndbufs and RMBs to use in later newly created
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SMC-R link group. Only for SMC-R.
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Default: 0 (physically contiguous sndbufs and RMBs)
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Possible values:
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- 0 - Use physically contiguous buffers
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- 1 - Use virtually contiguous buffers
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- 2 - Mixed use of the two types. Try physically contiguous buffers first.
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If not available, use virtually contiguous buffers then.
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