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From: Antonio Di Bacco <a.dibacco.ks@gmail.com>
Date: Tue, 19 Jul 2022 17:11:13 +0200
Message-ID: <CAO8pfFmC=RKXR_fgfX7XMjQVxcQqZZJYEWkfpKQ1=yY7vHhfWg@mail.gmail.com>
Subject: rte_memzone_reserve_aligned always allocate 1GB hugepages
 irrespective of the size I request I allocate
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I'm working on a system that has the following hugepages configuration:
##
sudo dpdk-hugepages.py -s
Node Pages Size Total
2    256   2Mb    512Mb
2    8     1Gb    8Gb
0    256   2Mb    512Mb
0    8     1Gb    8Gb
3    256   2Mb    512Mb
3    8     1Gb    8Gb
1    256   2Mb    512Mb
1    8     1Gb    8Gb
Hugepages mounted on /dev/hugepages
##

If I try to allocate memory with
rte_memzone_reserve_aligned(mem_name, 1024*1024, socket_id,
RTE_MEMZONE_2MB | RTE_MEMZONE_SIZE_HINT_ONLY |
RTE_MEMZONE_IOVA_CONTIG, RTE_CACHE_LINE_SIZE):

it always allocate the memory on 1GB hugepage.

If I remove RTE_MEMZONE_SIZE_HINT_ONLY flag, the allocation fails.


Regards.