Zach Brown c01a715852 scoutfs: use extents in the server allocator ...

Have the server use the extent core to maintain free extent items in the
allocation btree instead of the bitmap items.

We add a client request to allocate an extent of a given length.  The
existing segment alloc and free now work with a segment's worth of
blocks.

The server maintains counters in the super block of free blocks instead
of free segments.  We maintain an allocation cursor so that allocation
results tend to cycle through the device.  It's stored in the super so
that it is maintained across server instances.

This doesn't remove unused dead code to keep the commit from getting too
noisy.  It'll be removed in a future commit.

Signed-off-by: Zach Brown <zab@versity.com>

2018-06-29 14:42:06 -07:00

kmod

scoutfs: use extents in the server allocator

2018-06-29 14:42:06 -07:00

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