On 01-Jun-18 1:51 PM, Dariusz Stojaczyk wrote:
This isn't documented in the manuals, but a failed
mmap(..., MAP_FIXED) may still unmap overlapping
regions. In such case, we need to remap these regions
back into our address space to ensure mem contiguity.
We do it unconditionally now on mmap failure just to
be safe.
Verified on Linux 4.9.0-4-amd64. I was getting
ENOMEM when trying to map in hugetlbfs with no space
left, but the previous anonymous mapping was still
being removed.
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojac...@intel.com>
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Does this also happen with other error values?
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Thanks,
Anatoly
