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![]() e1000 writes to doorbells to post transmit descriptors and fill the receive ring. After writing descriptors to memory but before writing to doorbells, use dma_wmb() rather than wmb(). wmb() is more heavyweight than necessary for a device to see descriptor writes. On x86, this avoids SFENCEs before doorbell writes in both the Tx and Rx paths. On ARM, this converts DSB ST -> DMB OSHST. Tested: 82576EB / x86; QEMU (qemu emulates an 8257x) Signed-off-by: Venkatesh Srinivas <venkateshs@google.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> |
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.. | ||
e1000 | ||
e1000e | ||
fm10k | ||
i40e | ||
iavf | ||
ice | ||
igb | ||
igbvf | ||
igc | ||
ixgb | ||
ixgbe | ||
ixgbevf | ||
e100.c | ||
Kconfig | ||
Makefile |