On 12/17/22 17:12, devel@xxxxxxxxxxxxxxxxxxxxxxx wrote:
I *think* I may have found a bug in glibc in rawhide, but I'm not sure. I figured I would ask here first before filing a bug.I'm trying to track down a shared memory issue in openmpi on i686 rawhide: https://bugzilla.redhat.com/show_bug.cgi?id=2142304 https://github.com/open-mpi/ompi/issues/11065and the oddity that I'm looking at now is that a strange mmap() system call is being made rather than mmap2() which appears to be standard on i686:[pid 84] 19:38:24 mmap(NULL) = -1 EFAULT (Bad address) normally I see calls like:[pid 157] mmap2(NULL, 62328, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 24, 0) = 0xf5a74000Now is there any way that the openmpi code could be affecting how mmap() is being called? It basically does:mmap(NULL, real_size, PROT_READ | PROT_WRITE, MAP_SHARED, seg_id, 0)
Well, it turns out that openmpi is intercepting the mmap call, so it seems to be an incompatibility with how it is doing that now. Still no idea what, but hopefully openmpi upstream will have some ideas.
-- Orion Poplawski he/him/his - surely the least important thing about me IT Systems Manager 720-772-5637 NWRA, Boulder/CoRA Office FAX: 303-415-9702 3380 Mitchell Lane orion@xxxxxxxx Boulder, CO 80301 https://www.nwra.com/
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