Attention is currently required from: laforge, neels, pespin.

fixeria has posted comments on this change. ( 
https://gerrit.osmocom.org/c/osmo-msc/+/36760?usp=email )

Change subject: libmsc: add X5 timer for delaying LU connections
......................................................................


Patch Set 4:

(4 comments)

Patchset:

PS4:
> Just an idea: […]
I suggested this improvement to the customer (see note-16 in SYS#6913), but 
they refused. I would still like to implement this, but I ran out of the 
estimated time, so I'll leave this as a potential improvement for a separate 
patch.


PS4:
> If the SMSC has a response message to the readyForSM saying "ack, i had 
> nothing to submit", then I would again like to remove this timeout, as soon 
> as osmo-msc supports those messages.

This sounds logical and would be nice, but there exists no such thing in MAP 
protocol and thus should not be in GSUP, unless we really want to deviate from 
the former. See 3GPP TS 29.002, Table 12.4/1.


File src/libmsc/msc_a.c:

https://gerrit.osmocom.org/c/osmo-msc/+/36760/comment/db8c35e7_5129ac6b
PS4, Line 164: static void msc_a_put_use_lu(struct msc_a *msc_a)
> (i'd prefer the name msc_a_put_lu_deferred() […]
Done


File src/libmsc/ran_infra.c:

https://gerrit.osmocom.org/c/osmo-msc/+/36760/comment/cd9271a5_0f3703ef
PS4, Line 47:   { .T = -5, .default_val = 0, .unit = OSMO_TDEF_MS, .desc = 
"Additional delay for LU connections" }, \
(two separate things in one thread making it a bit hard to respond)

doc string change: ack, updated in the new patchset.

> you need to add a new timer entry to the list in the wiki: [...]

Done.

> I would encourage to avoid re-using the same timer numbers.
> By that scheme, currently the next available X timer is X 36 or -36.

I remember this was discussed somewhere, but I am not sure if we ever reached 
an agreement on the numbering scope of those Osmocom specific X-timers. 
According to that table, timer numbers like X1 and X2 are re-used in several 
projects, but AFAIU this is because they were added before you suggested to 
make X-timer numbers globally unique? Also, there is nothing on that wiki page 
saying "please avoid re-using the same timer numbers"...

I don't have a strong opinion here, so I'll just follow your suggestion.



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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-Change-Id: Ic519cab55d65e47b2636124427dab1a1d80fab78
Gerrit-Change-Number: 36760
Gerrit-PatchSet: 4
Gerrit-Owner: fixeria <[email protected]>
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Gerrit-Reviewer: laforge <[email protected]>
Gerrit-Reviewer: neels <[email protected]>
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