* Handling ordered tags
@ 2005-03-28 21:45 Brian King
0 siblings, 0 replies; only message in thread
From: Brian King @ 2005-03-28 21:45 UTC (permalink / raw)
To: linux-scsi
I'm trying to understand all the implications of allowing ordered tags
for a SCSI LLD, especially when running QERR=0 with autosense and no ACA.
Are any of these problems a concern given how ordered tags are used in Linux?
1. If an ordered tag is sent and a previously sent simple tagged op completes
with a failure, the ordered tag will still execute.
2. If an ordered tag is sent and completes with a failure, any simple tags sent
after it will execute.
I guess my bigger question is, are there any additional requirements on an LLD
in order for it to support ordered tags? Can the LLD send back responses in any
order?
Thanks
--
Brian King
eServer Storage I/O
IBM Linux Technology Center
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2005-03-28 21:45 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2005-03-28 21:45 Handling ordered tags Brian King
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox