diff options
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: ---------------- |