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author | Dana Robinson <derobins@hdfgroup.org> | 2019-02-04 17:09:55 (GMT) |
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committer | Dana Robinson <derobins@hdfgroup.org> | 2019-02-04 17:09:55 (GMT) |
commit | 5d024102ad7484172fb763b232cdb46e4ec4261d (patch) | |
tree | 0c7ac702a931646e4e0cbdd01dc1f1e571c07f2a /release_docs | |
parent | ae94128b328236cbb36c1da005e2211b5154d2b9 (diff) | |
parent | 12fc6bf95507244b2f18a56f8ff76cc0ea922fea (diff) | |
download | hdf5-5d024102ad7484172fb763b232cdb46e4ec4261d.zip hdf5-5d024102ad7484172fb763b232cdb46e4ec4261d.tar.gz hdf5-5d024102ad7484172fb763b232cdb46e4ec4261d.tar.bz2 |
Merge pull request #1519 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:hdf5_1_10 to hdf5_1_10
* commit '12fc6bf95507244b2f18a56f8ff76cc0ea922fea':
Merge of changes from develop for 1.10.5. Added RELEASE.txt entries for new features.
Diffstat (limited to 'release_docs')
-rw-r--r-- | release_docs/RELEASE.txt | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index ffb3092..fd8de96 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -135,6 +135,16 @@ New Features (DER - 2018/10/26, HDFFV-10614) + - Added a new option to enable/disable using pread/pwrite instead of + read/write in the sec2, log, and core VFDs. + + This option is enabled by default when pread/pwrite are detected. + + Autotools: --enable-preadwrite + CMake: HDF5_ENABLE_PREADWRITE + + (DER - 2019/02/03, HDFFV-10696) + Library: -------- @@ -197,6 +207,16 @@ New Features (JOS - 2019/01/04, TRILAB-45) + - The sec2, log, and core VFDs can now use pread/pwrite instead of + read/write. + + pread and pwrite do not change the file offset, a feature that was + requested by a user working with a multi-threaded application. + + The option to configure this feature is described above. + + (DER - 2019/02/03, HDFFV-10696) + Parallel Library: ----------------- @@ -433,6 +453,25 @@ Bug Fixes since HDF5-1.10.3 release (BMR - 2019/01/29, HDFFV-10684) + - Uninitialized bytes from a type conversion buffer could be written + to disk in H5Dwrite calls where type conversion takes place + and the type conversion buffer was created by the HDF5 library. + + When H5Dwrite is called and datatype conversion must be performed, + the library will create a temporary buffer for type conversion if + one is not provided by the user via H5Pset_buffer. This internal + buffer is allocated via malloc and contains uninitialized data. In + some datatype conversions (float to long double, possibly others), + some of this uninitialized data could be written to disk. + + This was flagged by valgrind in the dtransform test and does not + appear to be a common occurrence (it is flagged in one test out + of the entire HDF5 test suite). + + Switching to calloc fixed the problem. + + (DER - 2019/02/03, HDFFV-10694) + Java Library: ---------------- |