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Re: [lvm-devel] [PATCH] allocation: Allow "fuzzy" allocation when specifying size in percent

Dne 11.2.2014 00:29, Jonathan Brassow napsal(a):
This patch is still a bit rough around the edges and needs accompanying
tests before in can be checked-in.  If there are no objections to it,
I'll clean it up a bit more and add the tests.


Introduce a new parameter called "fuzzy_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 -l 100%FREE -n lv vg

(The stripe count is computed implicitly due to a previous patch, and
the full size of the PVs in the VG is used.)

I wouldn't call it  'fuzzy' - I guess we've discussed something like -
extent exact or up-to given number of extents allocation


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