| commit | 18a474d755aa10d881243d9457d2c420c5e4ea77 | |
| author | Jim Meyering <meyering@redhat.com> | |
| Wed, 20 Apr 2011 09:21:09 +0000 (20 11:21 +0200) | ||
| committer | Jim Meyering <meyering@redhat.com> | |
| Wed, 20 Apr 2011 16:48:48 +0000 (20 18:48 +0200) | ||
| tree | 4df68a02135e49569c3287ca0e25b886d9ba9732 | treesnapshot (tar.gz zip) |
| parent | 846d826096fc8fb621d751f8b3db1da68a8bbd06 | commitdiff |
copy: use FIEMAP (extent_copy) only for apparently-sparse files,
to avoid the expense of extent_copy's unconditional use of
FIEMAP_FLAG_SYNC.
* src/copy.c (copy_reg): Do not attempt extent_copy on a file
that appears to have no holes.
* NEWS (Changes in behavior): Document this. At first I labeled this
as a bug fix, but that would be inaccurate, considering there is no
documentation of FIEMAP semantics, nor even consensus among kernel
FS developers. Here's hoping SEEK_HOLE/SEEK_DATA support will soon
make it into the linux kernel.
to avoid the expense of extent_copy's unconditional use of
FIEMAP_FLAG_SYNC.
* src/copy.c (copy_reg): Do not attempt extent_copy on a file
that appears to have no holes.
* NEWS (Changes in behavior): Document this. At first I labeled this
as a bug fix, but that would be inaccurate, considering there is no
documentation of FIEMAP semantics, nor even consensus among kernel
FS developers. Here's hoping SEEK_HOLE/SEEK_DATA support will soon
make it into the linux kernel.
| NEWS | diffblobblamehistory | |
| src/copy.c | diffblobblamehistory |