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related to config settings:
obtain_device_info_from_udev (controls if lvm gets
a list of devices from readdir /dev or from libudev)
external_device_info_source (controls if lvm asks
libudev for device information)
. Make the obtain_device_list_from_udev setting
affect only the choice of readdir /dev vs libudev.
The setting no longer controls if udev is used for
device type checks.
. Change obtain_device_list_from_udev default to 0.
This helps avoid boot timeouts due to slow libudev
queries, avoids reported failures from
udev_enumerate_scan_devices, and avoids delays from
"device not initialized in udev database" errors.
Even without errors, for a system booting with 1024 PVs,
lvm2-pvscan times improve from about 100 sec to 15 sec,
and the pvscan command from about 64 sec to about 4 sec.
. For external_device_info_source="none", remove all
libudev device info queries, and use only lvm
native device info.
. For external_device_info_source="udev", first check
lvm native device info, then check libudev info.
. Remove sleep/retry loop when attempting libudev
queries for device info. udev info will simply
be skipped if it's not immediately available.
. Only set up a libdev connection if it will be used by
obtain_device_list_from_udev/external_device_info_source.
. For native multipath component detection, use
/etc/multipath/wwids. If a device has a wwid
matching an entry in the wwids file, then it's
considered a multipath component. This is
necessary to natively detect multipath
components when the mpath device is not set up.
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|---|---|---|
| .. | ||
| activate | ||
| cache | ||
| cache_segtype | ||
| commands | ||
| config | ||
| datastruct | ||
| device | ||
| display | ||
| error | ||
| filters | ||
| format_text | ||
| freeseg | ||
| integrity | ||
| label | ||
| locking | ||
| log | ||
| lvmpolld | ||
| metadata | ||
| mirror | ||
| misc | ||
| mm | ||
| notify | ||
| properties | ||
| raid | ||
| report | ||
| snapshot | ||
| striped | ||
| thin | ||
| unknown | ||
| uuid | ||
| vdo | ||
| writecache | ||
| zero | ||
| Makefile.in | ||