tree 8a899d51bded5daa887ebb540fe210dab38c8828
parent d81cd1feaf2c5850cbf79d2b41f5dfbe22e55374
author Josef Bacik <jbacik@fusionio.com> 1351804641 -0400
committer Josef Bacik <jbacik@fusionio.com> 1354725232 -0500

Btrfs: use a list for dirty log pages

Setting bits in an io tree for the dirty log pages is really expensive,
taking somewhere around 7us on my box.  So replace this with a basic list,
which makes this operation take .2 us per dirty eb.  This makes my sync test
go from 4.4 mb/s to 5.8 mb/s.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>