sfc: Report TX completions to BQL after all TX events in interrupt

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The limit for BQL is updated each time we call
netdev_tx_completed_queue.
Without this patch the BQL limit was updated for every TX event we
see.
The issue was that this only updated the limit to handle the data
we complete in two events as the first event wouldn't show that
enough traffic had been processed between them.

This was OK when interrupt moderation was off but not when it was
on as more data had to be completed in a single interrupt.

The patch changes this so that we do report the completion to BQL
only when all the TX events in the interrupt have been processed.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Peter Dunning 2015-07-08 10:05:10 +01:00 • committed by David S. Miller

parent d065c3c17d

commit c936835c1e

3 changed files with 18 additions and 1 deletions

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14

drivers/net/ethernet/sfc/efx.c

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2

drivers/net/ethernet/sfc/net_driver.h

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3

drivers/net/ethernet/sfc/tx.c

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