Nir Soffer has posted comments on this change.

Change subject: hba: Rescan using SCSI layer
......................................................................


Patch Set 2:

I found bug 844180, that was the trigger for adding scsi timeouts and writing 
to sysfs using multiple dd proceses.

 [root@orange-vdse ~]#  for p in qls /sys/class/scsi_host/host*/; do basename  
$p; time echo "- - -" > $p/scan; done
 ls

 real    0m0.225s
 user    0m0.000s
 sys     0m0.035s
 host3

 real    1m22.011s
 user    0m0.000s
 sys     0m0.000s
 host4

This looks too close the the iscsi replacement_timeout (120 seconds). I think 
the real solution is to set the proper timeout, not to add unneeded complexity.

I will discuss this with platform folks.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I7deb3047f1b75c4c65d59602b908835515290993
Gerrit-PatchSet: 2
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Nir Soffer <[email protected]>
Gerrit-Reviewer: Allon Mureinik <[email protected]>
Gerrit-Reviewer: Dan Kenigsberg <[email protected]>
Gerrit-Reviewer: Federico Simoncelli <[email protected]>
Gerrit-Reviewer: Nir Soffer <[email protected]>
Gerrit-Reviewer: Saggi Mizrahi <[email protected]>
Gerrit-Reviewer: [email protected]
Gerrit-Reviewer: oVirt Jenkins CI Server
Gerrit-HasComments: No
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