While debugging I found that multipath was not selecting the preferred path
many a times (inlcuding the failback scenarios).
Added a priority callout function and the expected behavior was still not
seen (patch 2 of 2).
More debugging revealed that the changes I made to work in the ghost
mode was wrong. Reverting those changes made the multipath behave properly.
Signed-off-by: Chandra Seetharaman <sekharan@xxxxxxxxxx>
Index: multipath-tools-0.4.7/libmultipath/discovery.c
===================================================================
--- multipath-tools-0.4.7.orig/libmultipath/discovery.c 2007-04-05 15:25:09.000000000 -0700
+++ multipath-tools-0.4.7/libmultipath/discovery.c 2007-05-17 10:07:56.000000000 -0700
@@ -699,7 +699,7 @@
if (mask & DI_CHECKER && get_state(pp))
goto blank;
- if (mask & DI_PRIO && pp->state == PATH_UP)
+ if (mask & DI_PRIO && pp->state != PATH_DOWN)
get_prio(pp);
if (mask & DI_WWID && !strlen(pp->wwid))
Index: multipath-tools-0.4.7/libmultipath/switchgroup.c
===================================================================
--- multipath-tools-0.4.7.orig/libmultipath/switchgroup.c 2007-04-04 12:25:32.000000000 -0700
+++ multipath-tools-0.4.7/libmultipath/switchgroup.c 2007-05-17 10:07:56.000000000 -0700
@@ -28,7 +28,7 @@
priority = 0;
vector_foreach_slot (pgp->paths, pp, j) {
- if (pp->state == PATH_UP)
+ if (pp->state != PATH_DOWN)
priority += pp->priority;
}
pgp->priority = priority;
--
----------------------------------------------------------------------
Chandra Seetharaman | Be careful what you choose....
- sekharan@xxxxxxxxxx | .......you may get it.
----------------------------------------------------------------------
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