xen-netback: Aggregate TX unmap operations

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Unmapping causes TLB flushing, therefore we should make it in the largest
possible batches. However we shouldn't starve the guest for too long. So if
the guest has space for at least two big packets and we don't have at least a
quarter ring to unmap, delay it for at most 1 milisec.

Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Zoltan Kiss 2014-03-06 21:48:31 +00:00 • committed by David S. Miller

parent 093507885a

commit e9275f5e2d

3 changed files with 37 additions and 1 deletions

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2

drivers/net/xen-netback/common.h

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2

drivers/net/xen-netback/interface.c

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34

drivers/net/xen-netback/netback.c

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