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qemu-options.hx: Clean up and fix typo for colo-compare

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Fix some typo and optimized some descriptions.

Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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Zhang Chen 2020-06-24 09:20:42 +08:00 committed by Jason Wang
parent a2e5cb7a87
commit 2b28a7ef90
1 changed files with 16 additions and 16 deletions
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qemu-options.hx
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@ -4696,24 +4696,24 @@ SRST
tools such as tcpdump or Wireshark. tools such as tcpdump or Wireshark.
``-object colo-compare,id=id,primary_in=chardevid,secondary_in=chardevid,outdev=chardevid,iothread=id[,vnet_hdr_support][,notify_dev=id][,compare_timeout=@var{ms}][,expired_scan_cycle=@var{ms}][,max_queue_size=@var{size}]`` ``-object colo-compare,id=id,primary_in=chardevid,secondary_in=chardevid,outdev=chardevid,iothread=id[,vnet_hdr_support][,notify_dev=id][,compare_timeout=@var{ms}][,expired_scan_cycle=@var{ms}][,max_queue_size=@var{size}]``
Colo-compare gets packet from primary\_inchardevid and Colo-compare gets packet from primary\_in chardevid and
secondary\_inchardevid, than compare primary packet with secondary\_in, then compare whether the payload of primary packet
secondary packet. If the packets are same, we will output and secondary packet are the same. If same, it will output
primary packet to outdevchardevid, else we will notify primary packet to out\_dev, else it will notify COLO-framework to do
colo-frame do checkpoint and send primary packet to checkpoint and send primary packet to out\_dev. In order to
outdevchardevid. In order to improve efficiency, we need to put improve efficiency, we need to put the task of comparison in
the task of comparison in another thread. If it has the another iothread. If it has the vnet\_hdr\_support flag,
vnet\_hdr\_support flag, colo compare will send/recv packet with colo compare will send/recv packet with vnet\_hdr\_len.
vnet\_hdr\_len. Then compare\_timeout=@var{ms} determines the The compare\_timeout=@var{ms} determines the maximum time of the
maximum delay colo-compare wait for the packet. colo-compare hold the packet. The expired\_scan\_cycle=@var{ms}
The expired\_scan\_cycle=@var{ms} to set the period of scanning is to set the period of scanning expired primary node network packets.
expired primary node network packets. The max\_queue\_size=@var{size} The max\_queue\_size=@var{size} is to set the max compare queue
is to set the max compare queue size depend on user environment. size depend on user environment.
If you want to use Xen COLO, will need the notify\_dev to If user want to use Xen COLO, need to add the notify\_dev to
notify Xen colo-frame to do checkpoint. notify Xen colo-frame to do checkpoint.
we must use it with the help of filter-mirror and COLO-compare must be used with the help of filter-mirror,
filter-redirector. filter-redirector and filter-rewriter.
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