On 01-Jun-18 1:59 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 hugetlbfs with no space
left, and the previous anonymous mapping was still
being removed.
Changes from v2:
* added "git fixline" tags
Changes from v1:
* checkpatch fixes
* remapping is now done regardless of the mmap errno
Fixes: 582bed1e1d1d ("mem: support mapping hugepages at runtime")
Cc: anatoly.bura...@intel.com
Cc: sta...@dpdk.org
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojac...@intel.com>
---
Acked-by: Anatoly Burakov <anatoly.bura...@intel.com>
Version changes should not be part of commit message. Thomas, could you
please fix this on apply?
--
Thanks,
Anatoly
