Re: [libvirt] [PATCH v2 3/3] memtune: change the way how we store unlimited value

There was a mess in the way how we store unlimited value for memory limits and how we handled values provided by user. Internally there were two possible ways how to store unlimited value: as 0 value or as VIR_DOMAIN_MEMORY_PARAM_UNLIMITED. Because we chose to store memory limits as unsigned long long, we cannot use -1 to represent unlimited. It's much easier for us to say that everything greater than VIR_DOMAIN_MEMORY_PARAM_UNLIMITED means unlimited and leave 0 as valid value despite that it makes no sense to set limit to 0. Remove unnecessary function virCompareLimitUlong. The update of test is to prevent the 0 to be miss-used as unlimited in future. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1146539 Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- docs/formatdomain.html.in | 4 +- src/conf/domain_conf.c | 75 +++++++++++++++++----- src/libvirt-domain.c | 3 + src/libvirt_private.syms | 1 - src/lxc/lxc_cgroup.c | 18 +++--- src/lxc/lxc_driver.c | 7 +- src/lxc/lxc_fuse.c | 12 ++-- src/lxc/lxc_native.c | 6 +- src/openvz/openvz_conf.c | 4 +- src/openvz/openvz_driver.c | 4 +- src/qemu/qemu_cgroup.c | 24 +++---- src/qemu/qemu_command.c | 8 ++- src/qemu/qemu_driver.c | 10 +-- src/qemu/qemu_hotplug.c | 2 +- src/qemu/qemu_migration.c | 5 +- src/util/virutil.c | 23 ------- src/util/virutil.h | 2 - tests/qemuxml2argvdata/qemuxml2argv-memtune.xml | 2 +- .../qemuxml2xmloutdata/qemuxml2xmlout-memtune.xml | 2 +- 19 files changed, 118 insertions(+), 94 deletions(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index 20e40aa..782c13c 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -2986,7 +2986,8 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver, QEMU_MIGRATION_COOKIE_NBD))) goto cleanup; - if (STREQ_NULLABLE(protocol, "rdma") && !vm->def->mem.hard_limit) { + if (STREQ_NULLABLE(protocol, "rdma") && + virMemoryLimitIsSet(vm->def->mem.hard_limit)) {

virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("cannot start RDMA migration with no memory hard " "limit set")); @@ -4102,7 +4103,7 @@ static int doNativeMigrate(virQEMUDriverPtr driver, "with this QEMU binary")); goto cleanup; } - if (!vm->def->mem.hard_limit) { + if (virMemoryLimitIsSet(vm->def->mem.hard_limit)) {

virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("cannot start RDMA migration with no memory hard " "limit set"));