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a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=x4eqshVgHu-cdnggieHk:22 a=b8zn4VCPTkzp0Y1Wa7gA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: mB8DhyvYHFPUrt5pTZddbjfiyDkVnf2b X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI0MDA4NiBTYWx0ZWRfXwSdpllUhswuj mEIlC6v01pu+UgDjwAhYs8Uu83KXgI6vIuFsb1sJ+tTzEPeM6kanTdDs2nP6wlfnMvzfnkQYP9d fmwIgXq4qnUTjj/iH9u1PX6/b0wC2eujer/NUMlyZG8XA+GiriLwSTd5e7C4EF/bCKGONpgITAC IzF7TmtrTmDBna4Iyn3TYjCT1f4p30BtXOSFuY/8w0lfqQMyTKSR+kas+O1G/J7dCj5lPFb0CFY gNAprEL1nuZpgSCmOeCdR90MVeJZz/F0NPai9riNAXGcu7toD3/WGwzI1g3jMbQAOUt9Ox0SgeG 5VNwSjanmYm5P9QJmEkh7dztoIu/t1cYPFxOpxztFjOr3lzJeJP8Zg3wms8e6/Ns0xYmHD5MWBy k+OsYCPXuLif4eT/aKCr+wzsb/LFKs4k7JwHAS7xHtLMcRcnKb7NexGrACPz6umpENoLFg7uQZx g6Brr0i/sa/NFJx6JuA== 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 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.