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dm bufio: switch from a huge hash table to an rbtree
authorJoe Thornber <ejt@redhat.com>
Mon, 6 Oct 2014 12:48:51 +0000 (13:48 +0100)
committerMike Snitzer <snitzer@redhat.com>
Mon, 10 Nov 2014 20:25:26 +0000 (15:25 -0500)
Converting over to using an rbtree eliminates a fixed 8MB allocation
from vmalloc space for the hash table.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

No differences found
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