"_free_segments_in_zones is not adjusted by
segment_pool::reclaim_segments() for empty zones on reclaim under some
conditions. For instance when some zone becomes empty due to regular
free() and then reclaiming is called from the std allocator, and it is
satisfied from a zone after the one which is empty. This would result
in free memory in such zone to appear as being leaked due to corrupted
free segment count, which may cause a later reclaim to fail. This
could result in bad_allocs.
The fix is to always collect such zones.
Fixes#3129
Refs #3119
Refs #3120"
* 'tgrabiec/fix-free_segments_in_zones-leak' of github.com:scylladb/seastar-dev:
tests: lsa: Test _free_segments_in_zones is kept correct on reclaim
lsa: Expose max_zone_segments for tests
lsa: Expose tracker::non_lsa_used_space()
lsa: Fix memory leak on zone reclaim
(cherry picked from commit 4ad212dc01)
a603111a85