1d56007ab1
There is currently a path through the grdma mpool and vma rcache that leads to deadlock. It happens during the rcache insert. Before the insert the rcache mutex is locked. During the call a new vma item is allocated and then inserted into the rcache tree. The allocation currently goes through the malloc hooks which may (and does) call back into the mpool if the ptmalloc heap needs to be reallocated. This callback tries to lock the rcache mutex which leads to the deadlock. This has been observed with multi-threaded tests and the openib btl. This change may lead to some minor slowdown in the rcache vma when threading is enabled. This will only affect larger message paths in some of the btls. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov> |
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| .. | ||
| base | ||
| vma | ||
| Makefile.am | ||
| rcache.h | ||