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| author | Todd Gamblin <tgamblin@llnl.gov> | 2016-10-06 00:31:19 -0700 |
|---|---|---|
| committer | Todd Gamblin <tgamblin@llnl.gov> | 2016-10-11 01:55:33 -0700 |
| commit | 3d8d8d3644d47c86ed8f77c488355ac1db1c8d42 (patch) | |
| tree | 319a3f83cf6307235bf09ae2b5b30b719424397c /.gitignore | |
| parent | a024c6df954fc43f5d47e788130b9af123bd4cdf (diff) | |
| download | spack-3d8d8d3644d47c86ed8f77c488355ac1db1c8d42.tar.gz spack-3d8d8d3644d47c86ed8f77c488355ac1db1c8d42.tar.bz2 spack-3d8d8d3644d47c86ed8f77c488355ac1db1c8d42.tar.xz spack-3d8d8d3644d47c86ed8f77c488355ac1db1c8d42.zip | |
Fix bug with lock upgrades.
- Closing and re-opening to upgrade to write will lose all existing read
locks on this process.
- If we didn't allow ranges, sleeping until no reads would work.
- With ranges, we may never be able to take some legal write locks
without invalidating all reads. e.g., if a write lock has distinct
range from all reads, it should just work, but we'd have to close the
file, reopen, and re-take reads.
- It's easier to just check whether the file is writable in the first
place and open for writing from the start.
- Lock now only opens files read-only if we *can't* write them.
Diffstat (limited to '.gitignore')
0 files changed, 0 insertions, 0 deletions