diff options
| author |   Alex Gartrell <agartrell@fb.com> | 2014-05-20 13:07:56 -0700 |
|---|---|---|
| committer |   Chris Mason <clm@fb.com> | 2014-06-09 17:20:57 -0700 |
| commit | fc4adbff823f76577ece26dcb88bf6f8392dbd43 (patch) | |
| tree | d3708c9b2f6e3023a7da4452d90f65e99a007213 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | Btrfs: cut down stack usage in btree_write_cache_pages (diff) | |
| download | linux-dev-fc4adbff823f76577ece26dcb88bf6f8392dbd43.tar.xz linux-dev-fc4adbff823f76577ece26dcb88bf6f8392dbd43.zip | |
btrfs: Drop EXTENT_UPTODATE check in hole punching and direct locking
In these instances, we are trying to determine if a page has been accessed
since we began the operation for the sake of retry. This is easily
accomplished by doing a gang lookup in the page mapping radix tree, and it
saves us the dependency on the flag (so that we might eventually delete
it).
btrfs_page_exists_in_range borrows heavily from find_get_page, replacing
the radix tree look up with a gang lookup of 1, so that we can find the
next highest page >= index and see if it falls into our lock range.
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions