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Cope with missing swap cgroup controls

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It is possible to build a kernel without swap cgroup controls
present. This causes a fatal error when querying memory
parameters. Treat missing swap controls as meaning "unlimited".
The fatal error remains if the user tries to actually change
the limit.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange 2013-05-09 13:53:39 +01:00
parent 95934171fb
commit f493d83fbd
1 changed files with 6 additions and 3 deletions
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9
src/qemu/qemu_driver.c
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@ -7613,9 +7613,12 @@ qemuDomainGetMemoryParameters(virDomainPtr dom,
case 2: /* fill swap hard limit here */ case 2: /* fill swap hard limit here */
rc = virCgroupGetMemSwapHardLimit(priv->cgroup, &val); rc = virCgroupGetMemSwapHardLimit(priv->cgroup, &val);
if (rc != 0) { if (rc != 0) {
virReportSystemError(-rc, "%s", if (rc != -ENOENT) {
_("unable to get swap hard limit")); virReportSystemError(-rc, "%s",
goto cleanup; _("unable to get swap hard limit"));
goto cleanup;
}
val = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
} }
if (virTypedParameterAssign(param, if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT, VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT,