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Make UD OOB memory registrations a multiple of page size #976
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If ibv_fork_init() has been invoked the pages are marked MADV_DONTFORK. If we only partially use a page, any data allocated on the remainder of the page will be inaccessible to the child process. Fixes open-mpi/ompi#1363
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:bot:assign: @jsquyres |
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We hit this issue fairly frequently on PPC due to the larger default page size (64k). This might be a problem on intel too. |
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Test FAILed. |
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:bot:retest |
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Test FAILed. |
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Can ignore the Mellanox error here. Will go away when the XRC PR is in. |
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:bot:retest: |
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👍 once it passes jenkins |
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Test PASSed. |
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Decided in the meeting today: this one is good to go. |
jsquyres
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Feb 25, 2016
Make UD OOB memory registrations a multiple of page size
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If ibv_fork_init() has been invoked the pages are marked MADV_DONTFORK.
If we only partially use a page, any data allocated on the remainder of
the page will be inaccessible to the child process.
Fixes open-mpi/ompi#1363