B.13. dapl

Updated dapl packages that fix several bugs and add provider entries to the dat.conf are now available.
dapl provides a userspace implementation of the DAT 2.0 API and is built to natively support InfiniBand and iWARP network technology.
Bug Fixes
Under certain error conditions dapl did not allow the cp_ptr entry to be cleaned up correctly in the internal link list. This could cause new connections to fail. With this update, the entry is cleaned up correctly and subsequent connections work as expected.
Under certain error conditions dapl could fail to free allocated memory. The consequent memory leak could, potentially, result in an out of memory condition for the application. This update frees allocated memory correctly, closing the leak.
Under certain circumstances, when a thread was waiting on dapls_evd_dto_wait() and the thread received a signal, the function would return an incorrect error code, resulting in the application failing rather than retrying the request.
On systems with multiple InfiniBand (IB) adapters, especially if some were configured and some not, the dat_ia_open() function could hang when the driver queried the IB devices listed in /etc/dat.conf. This primarily presented as IBM DB2 installations hanging before they completed. With this update, the dat_ia_open() hang has been fixed and IBM DB2 installations, in particular, now succeed as expected.
New provider entries for Mellanox RDMA over Converged Ethernet (RoCE) devices were added to the dat.conf file.
Users should upgrade to these updated packages, which fix these issues.