Christopher Haster 95c1a6339d Fixed corner case in block_cycles eviction logic ...

The problem was when we allocate a dir-pair, it's possible for the
revision count to immediately overflow and the dir-pair be evicted and
returned to the unused blocks without being written even once. In the
case that block_cycles = 1, this made it impossible to ever create a
dir-pair, even in lfs_format.

I've also added a bit of logic to lfs_dir_alloc that will prevent
any immediate evictions because of the revision count.

found by TheLoneWolfling

2019-01-29 22:43:19 -06:00

110 KiB

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