[libvirt PATCH 2/2] nodedev: update mdevs from the mdevctl thread
Rather than directly executing mdevctl from the udev event thread when
we determine that we need to re-query, schedule the mdevctl thread to
run. This also helps to coalesce multiple back-to-back updates into a
single one when there are multiple updates in a row or at startup when a
host has a very large number of mdevs.
Signed-off-by: Jonathon Jongsma <jjongsma(a)redhat.com>
---
src/node_device/node_device_udev.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/src/node_device/node_device_udev.c b/src/node_device/node_device_udev.c
index 9ba550dbc1..da63d326a1 100644
--- a/src/node_device/node_device_udev.c
+++ b/src/node_device/node_device_udev.c
@@ -1443,6 +1443,9 @@ udevGetDeviceDetails(struct udev_device *device,
}
+static void scheduleMdevctlUpdate(udevEventData *data, bool force);
+
+
static int
udevRemoveOneDeviceSysPath(const char *path)
{
@@ -1475,8 +1478,7 @@ udevRemoveOneDeviceSysPath(const char *path)
virNodeDeviceObjEndAPI(&obj);
/* cannot check for mdev_types since they have already been removed */
- if (nodeDeviceUpdateMediatedDevices() < 0)
- VIR_WARN("mdevctl failed to update mediated devices");
+ scheduleMdevctlUpdate(driver->privateData, false);
virObjectEventStateQueue(driver->nodeDeviceEventState, event);
return 0;
@@ -1604,8 +1606,8 @@ udevAddOneDevice(struct udev_device *device)
has_mdev_types = virNodeDeviceObjHasCap(obj, VIR_NODE_DEV_CAP_MDEV_TYPES);
virNodeDeviceObjEndAPI(&obj);
- if (has_mdev_types && nodeDeviceUpdateMediatedDevices() < 0)
- VIR_WARN("mdevctl failed to update mediated devices");
+ if (has_mdev_types)
+ scheduleMdevctlUpdate(driver->privateData, false);
ret = 0;
@@ -1767,8 +1769,7 @@ udevHandleOneDevice(struct udev_device *device)
if (ret == 0 &&
udevGetDeviceType(device, &dev_cap_type) == 0 &&
dev_cap_type == VIR_NODE_DEV_CAP_MDEV)
- if (nodeDeviceUpdateMediatedDevices() < 0)
- VIR_WARN("mdevctl failed to update mediated devices");
+ scheduleMdevctlUpdate(driver->privateData, false);
return ret;
}
--
2.41.0