tree 80535e6fab2d3033eeb16f32ba6a0a1f614564db
parent 0f3e1c7f23f8a6f8224fa1d275381f6d9279ad4b
author Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1239069699 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1239118276 -0700

nilfs2: another dat for garbage collection

NILFS2 uses another DAT inode during garbage collection to ensure
atomicity and consistency of the DAT in the transient state.  This
twin inode is called GCDAT.

This adds functions to initialize the GCDAT and to switch page caches
and B-tree node caches between these two inodes.

Signed-off-by: Seiji Kihara <kihara.seiji@lab.ntt.co.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Yoshiji Amagai <amagai.yoshiji@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>