If the failback period is set to more that four times the polling interval,
paths will never fail back. This is because the failback_tick keeps getting
reet. The attached patch fixes this.
diff -urpN mp-devel-clean/multipathd/main.c mp-devel-patched/multipathd/main.c
--- mp-devel-clean/multipathd/main.c 2006-02-15 15:26:13.000000000 -0600
+++ mp-devel-patched/multipathd/main.c 2006-02-15 17:48:56.000000000 -0600
@@ -1265,7 +1265,8 @@ checkerloop (void *ap)
pathinfo(pp, conf->hwtable, DI_PRIO);
if (need_switch_pathgroup(pp->mpp, 0)) {
- if (pp->mpp->pgfailback > 0)
+ if (pp->mpp->pgfailback > 0 &&
+ pp->mpp->failback_tick <= 0)
pp->mpp->failback_tick =
pp->mpp->pgfailback + 1;
else if (pp->mpp->pgfailback ==
--
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