Revert "mm: try to distribute dirty pages fairly across zones"

This reverts commit 98365e98ccddbb053004b8033730df0c958314fe.
Revert "mm/page-writeback.c: make determine_dirtyable_memory static again"

This reverts commit 186c46732e6e7b8a5746418daacabc7dbe779343.
Revert "writeback: move MIN_WRITEBACK_PAGES to fs-writeback.c"

This reverts commit dc5910fd8ae425433761ca315ec66708125a5bf5.
Revert "writeback: charge leaked page dirties to active tasks"

This reverts commit 27e5b75c24f68ffbf3f14fcd549c1c4fb737840e.
Revert "writeback: fix dirtied pages accounting on redirty"

This reverts commit 13251c85fe1076d9e679104d68616596bd9794a2.
Revert "writeback: Add a 'reason' to wb_writeback_work"

This reverts commit fdb9dea7f2f7e2bbe2b4cff5b8c4b34f33ad0438.
Revert "writeback: add bg_threshold parameter to __bdi_update_bandwidth()"

This reverts commit 2b60e52b0722347d93270053ef4b97a55f507bda.
Revert "squeeze max-pause area and drop pass-good area"

This reverts commit d2c0efd2e46b5d3c673561011852e4a71ead959b.
Revert "writeback: scale IO chunk size up to half device bandwidth"

This reverts commit e0d361741cf97acd9a645d6602e9910488bbb1a4.
Revert "writeback: introduce max-pause and pass-good dirty limits"

This reverts commit eec83d8c11bd4bd65045c7f0abc8fe74b1a96d90.
Revert "writeback: introduce smoothed global dirty limit"

This reverts commit 8e51d93b7e6d6a901801e6f1cd2aee841f94869c.
Revert "writeback: bdi write bandwidth estimation"

This reverts commit bd54ad9c1f5b1f9467ba4bd9af178a413dd42ee3.
Revert "writeback: make writeback_control.nr_to_write straight"

This reverts commit b47d5cb3ee5bc25b2c493ab97fc8ea422640ddf4.
Revert "writeback: remove .nonblocking and .encountered_congestion"

This reverts commit 720dfedb43f62169b98b1d8f74001032ca8560c3.
Revert "writeback: remove writeback_control.more_io"

This reverts commit 6892abf8c614a8d84dd2d7eb0fa413ff62634504.
Revert "writeback: avoid extra sync work at enqueue time"

This reverts commit 5ce19ee3f3a6ccd585e26ff1a5ac80d2c9da3fb7.
Revert "writeback: split inode_wb_list_lock into bdi_writeback.list_lock"

This reverts commit e2285794026b8cf2bfcb6ed288d36735e9a9a3ca.
Revert "writeback: introduce writeback_control.inodes_written"

This reverts commit d8c5607ffc41493897a4c7bdee67a5dcfb6c71cf.