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Introduce a new parameter called "approx_alloc" that is set when the
desired size of a new LV is specified in percentage terms. If set,
the allocation code tries to get as much space as it can but does not
fail if can at least get some.
One of the practical implications is that users can now specify 100%FREE
when creating RAID LVs, like this:
~> lvcreate --type raid5 -i 2 -l 100%FREE -n lv vg
Update release_lv_segment_area not to discard any PV extents,
as it also gets used when moving extents between LVs.
Instead, call a new function release_and_discard_lv_segment_area() in
the two places where data should be discarded - lv_reduce() and
remove_mirrors_from_segments().
When moving parts of striped LVs, pvmove wouldn't care about leaving you with
two stripes on the same disk. Now --alloc anywhere is needed for that.
(Tried and gave up on two alternative approaches before the one committed here.)
This check-in enables the 'mirrored' log type. It can be specified
by using the '--mirrorlog' option as follows:
#> lvcreate -m1 --mirrorlog mirrored -L 5G -n lv vg
I've also included a couple updates to the testsuite. These updates
include tests for the new log type, and some fixes to some of the
*lvconvert* tests.
At this point they probably do not matter but going forward they
may - depends on future patches for replicator, etc. I think
these probably got missed because they were 'flags' so I changed
the name to 'status' to be consistent. So the on-disk
things 'flags' and the in structure 'status' (bits).
NOTE: WHATS_NEW already has entry for this in current release.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
The physical_volume, volume_group, logical_volume and lv_segment
structures' 'status' member is now uint64_t.
The alignment of these structures was also audited to remove holes. The
movement of some members in 'volume_group' and 'lv_segment' eliminates
holes. The 'physical_volume' structure still has one 4-byte hole after
'pe_size'; the other structures no longer have any holes. Each
structures' size has not changed.
It fails for 1k PE now.
Patch adds log_region_size into allocation habdle struct
and use it in _alloc_parallel_area() for proper log size calculation
instead of hardcoded 1 extent - which can fail.
Reproducer for incorrect log size calculation:
DEV=/dev/sd[bcd]
pvcreate $DEV
vgcreate -s 1k vg_test $DEV
lvcreate -m1 -L 12M -n mirr vg_test
https://bugzilla.redhat.com/show_bug.cgi?id=477040
The log size calculation is mostly copied from kernel code.
Fix some memory leaks in error paths found by coverity.
Use C99 struct initialisers.
Move DEFS into configure.h.
Clean-ups to remove miscellaneous compiler warnings.
