[libvirt] [PATCH] 504914 Xen scheduler setting problems

504914 Xen scheduler setting problems https://bugzilla.redhat.com/show_bug.cgi?id=504914 Doing virsh schedinfo rhel5u3 --cap 65535 the hypervisor does the call, but does not change the value nor raise an error. Best is just to consider it's not in the allowed values The problem is that the error won't be ouput since the xend driver will then be called and raise an error error: this function is not supported by the hypervisor: unsupported in xendConfigVersion < 4 which will override the useful information from xenUnifiedDomainSetSchedulerParameters() So best is to also invert the order in which the xen sub-drivers are called * src/xen/xen_hypervisor.c: mark 65535 cap value as out of bound * src/xen/xen_hypervisor.c: reverse the order of the calls to the xen sub drivers to get the error message if needed diff --git a/src/xen/xen_driver.c b/src/xen/xen_driver.c index 4bfcce4..a7da2ec 100644 --- a/src/xen/xen_driver.c +++ b/src/xen/xen_driver.c @@ -1524,7 +1524,8 @@ xenUnifiedDomainSetSchedulerParameters (virDomainPtr dom, GET_PRIVATE(dom->conn); int i, ret; - for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i) { + /* do the hypervisor call last to get better error */ + for (i = XEN_UNIFIED_NR_DRIVERS - 1; i >= 0; i--) { if (priv->opened[i] && drivers[i]->domainSetSchedulerParameters) { ret = drivers[i]->domainSetSchedulerParameters(dom, params, nparams); if (ret == 0) diff --git a/src/xen/xen_hypervisor.c b/src/xen/xen_hypervisor.c index 843102a..4254bcd 100644 --- a/src/xen/xen_hypervisor.c +++ b/src/xen/xen_hypervisor.c @@ -1345,8 +1345,8 @@ xenHypervisorSetSchedulerParameters(virDomainPtr domain, } else if (STREQ (params[i].field, str_cap) && params[i].type == VIR_DOMAIN_SCHED_FIELD_UINT) { val = params[i].value.ui; - if (val > USHRT_MAX) { - snprintf(buf, sizeof(buf), _("Credit scheduler cap parameter (%d) is out of range (0-65535)"), val); + if (val >= USHRT_MAX) { + snprintf(buf, sizeof(buf), _("Credit scheduler cap parameter (%d) is out of range (0-65534)"), val); virXenErrorFunc (domain->conn, VIR_ERR_INVALID_ARG, __FUNCTION__, buf, val); return(-1); } -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/