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cgroup: Fix start VMs coincidently failed

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When I start multi VMs coincidently and any of the cgroup directories
named machine doesn't exist. There's a chance that VM start failed because
of creating directory failed:
Unable to initialize /machine cgroup: File exists
When the errno returned by mkdir in virCgroupMakeGroup is EEXIST,
we should pass it through and continue to start the VM.
Signed-off-by: Wang Yufei <james.wangyufei@huawei.com>
This commit is contained in:
Wang Yufei 2014-03-20 07:14:01 +00:00 committed by Michal Privoznik
parent edff187a39
commit bfb29654c8
1 changed files with 4 additions and 0 deletions
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4
src/util/vircgroup.c
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@ -924,6 +924,10 @@ virCgroupMakeGroup(virCgroupPtr parent,
if (!virFileExists(path)) { if (!virFileExists(path)) {
if (!create || if (!create ||
mkdir(path, 0755) < 0) { mkdir(path, 0755) < 0) {
if (errno == EEXIST) {
VIR_FREE(path);
continue;
}
/* With a kernel that doesn't support multi-level directory /* With a kernel that doesn't support multi-level directory
* for blkio controller, libvirt will fail and disable all * for blkio controller, libvirt will fail and disable all
* other controllers even though they are available. So * other controllers even though they are available. So