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nodedev: update mdevs from the mdevctl thread

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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@redhat.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
This commit is contained in:
Jonathon Jongsma 2023-07-06 09:16:35 -05:00
parent 9b7fadc5dc
commit 14026db9b0
1 changed files with 7 additions and 6 deletions
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13
src/node_device/node_device_udev.c
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@ -1451,6 +1451,9 @@ udevGetDeviceDetails(struct udev_device *device,
}
static void scheduleMdevctlUpdate(udevEventData *data, bool force);
static int
udevRemoveOneDeviceSysPath(const char *path)
{
@ -1483,8 +1486,7 @@ 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;
@ -1612,8 +1614,8 @@ 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;
@ -1775,8 +1777,7 @@ 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;
}