On 23/03/2026 13:42, John Garry wrote:
On 18/03/2026 07:54, Hannes Reinecke wrote:
/*
* submit_rtpg - Issue a REPORT TARGET GROUP STATES command
* @sdev: sdev the command should be sent to
???
And this function is useful _why_?
We're just sending a normal 'TEST UNIT READY', it has nothing to
do with ALUA. Why do we have a special function here?
This is used in the STPG code, and I added the STPG code to scsi_alua.c
I meant to say that this is used in RTPG code from the following:
commit 9d2c30395213166e0b5614fe97576a789864e5de
Author: Hannes Reinecke <[email protected]>
Date: Fri Feb 19 09:17:15 2016 +0100
scsi_dh_alua: Send TEST UNIT READY to poll for transitioning
Sending a 'REPORT TARGET PORT GROUP' command is a costly operation,
as the array has to gather information about all ports.
So instead of using RTPG to poll for a status update when a port
is in transitioning we should be sending a TEST UNIT READY, and
wait for the sense code to report success.
