]> git.baikalelectronics.ru Git - kernel.git/commit
Btrfs: introduce free_extent_buffer_stale
authorJosef Bacik <josef@redhat.com>
Fri, 9 Mar 2012 21:01:49 +0000 (16:01 -0500)
committerChris Mason <chris.mason@oracle.com>
Mon, 26 Mar 2012 20:51:08 +0000 (16:51 -0400)
commit0d1befcdb836a5b364beeae5002c122ab99857dd
tree0265021499da54e5b4667a041f8b82c6d1a8667e
parentdccd1fe043650ec6aef7ff584273d46ae91eeb97
Btrfs: introduce free_extent_buffer_stale

Because btrfs cow's we can end up with extent buffers that are no longer
necessary just sitting around in memory.  So instead of evicting these pages, we
could end up evicting things we actually care about.  Thus we have
free_extent_buffer_stale for use when we are freeing tree blocks.  This will
make it so that the ref for the eb being in the radix tree is dropped as soon as
possible and then is freed when the refcount hits 0 instead of waiting to be
released by releasepage.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
fs/btrfs/ctree.c
fs/btrfs/disk-io.c
fs/btrfs/extent-tree.c
fs/btrfs/extent_io.c
fs/btrfs/extent_io.h