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| author | Wei Liu <[email protected]> | 2013-08-26 11:59:37 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2013-08-29 05:18:04 +0000 |
| commit | 43e9d1943278e96150b449ea1fa81f4ae27729d5 (patch) | |
| tree | 76c3752f6a2c4f6284b55b783ba78d686b36da14 /drivers/net/xen-netback/interface.c | |
| parent | Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/... (diff) | |
| download | kernel-43e9d1943278e96150b449ea1fa81f4ae27729d5.tar.gz kernel-43e9d1943278e96150b449ea1fa81f4ae27729d5.zip | |
xen-netback: remove page tracking facility
The data flow from DomU to DomU on the same host in current copying
scheme with tracking facility:
copy
DomU --------> Dom0 DomU
| ^
|____________________________|
copy
The page in Dom0 is a page with valid MFN. So we can always copy from
page Dom0, thus removing the need for a tracking facility.
copy copy
DomU --------> Dom0 -------> DomU
Simple iperf test shows no performance regression (obviously we copy
twice either way):
W/ tracking: ~5.3Gb/s
W/o tracking: ~5.4Gb/s
Signed-off-by: Wei Liu <[email protected]>
Acked-by: Ian Campbell <[email protected]>
Acked-by: Matt Wilson <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'drivers/net/xen-netback/interface.c')
0 files changed, 0 insertions, 0 deletions