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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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|---|---|---|
| .. | ||
| crc_gen.c | ||
| crc.c | ||
| crc.h | ||
| intl.h | ||
| last-path-component.h | ||
| lib.h | ||
| lvm-exec.c | ||
| lvm-exec.h | ||
| lvm-file.c | ||
| lvm-file.h | ||
| lvm-flock.c | ||
| lvm-flock.h | ||
| lvm-globals.c | ||
| lvm-globals.h | ||
| lvm-maths.c | ||
| lvm-maths.h | ||
| lvm-percent.c | ||
| lvm-percent.h | ||
| lvm-signal.c | ||
| lvm-signal.h | ||
| lvm-string.c | ||
| lvm-string.h | ||
| lvm-wrappers.c | ||
| lvm-wrappers.h | ||
| sharedlib.c | ||
| sharedlib.h | ||
| util.h | ||