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Avoid monitoring of activated cache-pool - where the only purpose ATM
is to clear metadata volume which is actually activate in place
of cache-pool name (using public LV name).
Since VG lock is held across whole clear operation, dmeventd cannot
be used anyway - however in case of appliction crash we may
leave unmonitored device.
In future we may provide better mechanism as the current name
replacemnet is creating 'uncommon' table setups in case the metadata
LV is more complex type like raid (needs some futher thinking about
error path results).
Another point to think about is the fact we should not clear device
while holding lock (i.e. dmeventd mirror repair cannot work in cases
like this).
Introduce 'hard limit' for max number of cache chunks.
When cache target operates with too many chunks (>10e6).
When user is aware of related possible troubles he
may increase the limit in lvm.conf.
Also verbosely inform user about possible solution.
Code works for both lvcreate and lvconvert.
Lvconvert fully supports change of chunk_size when caching LV
(and validates for compatible settings).
Commit e947c362dd introduced
config_settings.h file for central place to store all definitions for
config options. By mistake, it used report/colums_as_rows instead
of report/columns_as_rows (missing "n" in "columns").
If the number of stripes requested is incompatible with the requested
type of raid, give an error instead of adjusting it.
If no stripes argument is supplied, continue to use an appropriate
default.
a579ba2ac2 fixed a regression causing a segfault if no external
origin existed but broke the logic leading to erroneous error
messages and creations of split off exported VGs in case the
external origin and the pool LVs were allocated on different PVs.
- resolves rhbz1367459
Creating a RaidLV in VGs with very small extent sizes caused
late failure in the kernel giving a not very informative error
message. Catch the attempt early and display failure message
'Unable to create RAID LV: requires minimum VG extent size 4.00 KiB'.
- resoves rhbz1179970
'pvmove -n name pv1 pv2' called with the name of a top-level LV
failed with mentioned commit.
Enhance pvmove-raid-segtypes.sh to test for prohibited RAID SubLV moves.
'pvmove -n name pv1 pv2' allows to collocate multiple RAID SubLVs
on pv2 (e.g. results in collocated raidlv_rimage_0 and raidlv_rimage_1),
thus causing loss of resilence and/or performance of the RaidLV.
Fix this pvmove flaw leading to potential data loss in case of PV failure
by preventing any SubLVs from collocation on any PVs of the RaidLV.
Still allow to collocate any DataLVs of a RaidLV with their sibling MetaLVs
and vice-versa though (e.g. raidlv_rmeta_0 on pv1 may still be moved to pv2
already holding raidlv_rimage_0).
Because access to the top-level RaidLV name is needed,
promote local _top_level_lv_name() from raid_manip.c
to global top_level_lv_name().
- resolves rhbz1202497
Adding MetaLVs to given DataLVs (e.g. raid0 -> raid0_meta takeover),
_avoid_pvs_with_other_images_of_lv() was missing code to prohibit
allocation when called with a just allocated MetaLV to prohibit
collaocation of the next allocated MetaLV on the same PV.
- resolves rhbz1366738
When lvm is compiled with --enable-notify-dbus and a user uses lvm
shell, after they issue 200+ commands the lvm shell will hang for
~30 seconds trying to notify the lvm dbus service that a change
has occurred. This appears to be caused by resource exhaustion,
because the sockets used for dbus communication are not be closed.
Enforce mirror/raid0/1/10/4/5/6 type specific maximum images when
creating LVs or converting them from mirror <-> raid1.
Document those maxima in the lvcreate/lvconvert man pages.
- resolves rhbz1366060
Some settings are not suitable for override in interactive/shell
mode because such settings may confuse the code and it may end
up with unexpected behaviour. This is because of the fact that
once we're in the interactive/shell mode, we have already applied
some settings for the shell itself and we can't override them
further because we're already using those settings to drive the
interactive/shell mode. Such settings would get ignored silently
or, in worse case, they would mess up the existing configuration.
