net:add one common config ARCH_WANT_RELAX_ORDER to support relax ordering (1a8b6d76) · Commits · 戴 / test

Relax ordering(RO) is one feature of 82599 NIC, to enable this feature can enhance the performance for some cpu architecure, such as SPARC and so on. Currently it only supports one special cpu architecture(SPARC) in 82599 driver to enable RO feature, this is not very common for other cpu architecture which really needs RO feature. This patch add one common config CONFIG_ARCH_WANT_RELAX_ORDER to set RO feature, and should define CONFIG_ARCH_WANT_RELAX_ORDER in sparc Kconfig firstly. Signed-off-by:

Mao Wenan <maowenan@huawei.com> Reviewed-by:

Alexander Duyck <alexander.duyck@gmail.com> Reviewed-by:

Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

arch/Kconfig

+3 −0

Original line number	Diff line number	Diff line
		@@ -781,4 +781,7 @@ config VMAP_STACK
		the stack to map directly to the KASAN shadow map using a formula
		that is incorrect if the stack is in vmalloc space.

		config ARCH_WANT_RELAX_ORDER
		bool

		source "kernel/gcov/Kconfig"

arch/sparc/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,7 @@ config SPARC
		select CPU_NO_EFFICIENT_FFS
		select HAVE_ARCH_HARDENED_USERCOPY
		select PROVE_LOCKING_SMALL if PROVE_LOCKING
		select ARCH_WANT_RELAX_ORDER

		config SPARC32
		def_bool !64BIT

drivers/net/ethernet/intel/ixgbe/ixgbe_common.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -350,7 +350,7 @@ s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw)
		}
		IXGBE_WRITE_FLUSH(hw);

		#ifndef CONFIG_SPARC
		#ifndef CONFIG_ARCH_WANT_RELAX_ORDER
		/* Disable relaxed ordering */
		for (i = 0; i < hw->mac.max_tx_queues; i++) {
		u32 regval;

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