linux-kernel - Re: [PATCH 4/4] selftests/vm: Drop mnt point for hugetlb in run

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Date:   Tue, 4 Oct 2022 15:04:28 -0700
From:   Axel Rasmussen <axelrasmussen@...gle.com>
To:     Peter Xu <peterx@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 4/4] selftests/vm: Drop mnt point for hugetlb in run_vmtests.sh

On Tue, Oct 4, 2022 at 2:43 PM Peter Xu <peterx@...hat.com> wrote:
>
> After converting all the three relevant testcases (uffd, madvise, mremap)
> to use memfd, no test will need the hugetlb mount point anymore.  Drop the
> code.
>
> Signed-off-by: Peter Xu <peterx@...hat.com>
> ---
>  tools/testing/selftests/vm/run_vmtests.sh | 18 +++---------------
>  1 file changed, 3 insertions(+), 15 deletions(-)
>
> diff --git a/tools/testing/selftests/vm/run_vmtests.sh b/tools/testing/selftests/vm/run_vmtests.sh
> index e780e76c26b8..0dc9f545a32d 100755
> --- a/tools/testing/selftests/vm/run_vmtests.sh
> +++ b/tools/testing/selftests/vm/run_vmtests.sh
> @@ -5,7 +5,6 @@
>  # Kselftest framework requirement - SKIP code is 4.
>  ksft_skip=4
>
> -mnt=./huge
>  exitcode=0
>
>  #get huge pagesize and freepages from /proc/meminfo
> @@ -84,9 +83,6 @@ run_test() {
>         fi
>  }
>
> -mkdir "$mnt"
> -mount -t hugetlbfs none "$mnt"
> -
>  run_test ./hugepage-mmap
>
>  shmmax=$(cat /proc/sys/kernel/shmmax)
> @@ -98,14 +94,9 @@ echo "$shmmax" > /proc/sys/kernel/shmmax
>  echo "$shmall" > /proc/sys/kernel/shmall
>
>  run_test ./map_hugetlb
> -
> -run_test ./hugepage-mremap "$mnt"/huge_mremap
> -rm -f "$mnt"/huge_mremap
> -
> +run_test ./hugepage-mremap
>  run_test ./hugepage-vmemmap
> -
> -run_test ./hugetlb-madvise "$mnt"/madvise-test
> -rm -f "$mnt"/madvise-test
> +run_test ./hugetlb-madvise
>
>  echo "NOTE: The above hugetlb tests provide minimal coverage.  Use"
>  echo "      https://github.com/libhugetlbfs/libhugetlbfs.git for"
> @@ -126,14 +117,11 @@ for mod in "${uffd_mods[@]}"; do
>         # Hugetlb tests require source and destination huge pages. Pass in half
>         # the size ($half_ufd_size_MB), which is used for *each*.
>         run_test ./userfaultfd hugetlb${mod} "$half_ufd_size_MB" 32
> -       run_test ./userfaultfd hugetlb_shared${mod} "$half_ufd_size_MB" 32 "$mnt"/uffd-test
> -       rm -f "$mnt"/uffd-test
> +       run_test ./userfaultfd hugetlb_shared${mod} "$half_ufd_size_MB" 32
>         run_test ./userfaultfd shmem${mod} 20 16
>  done
>
>  #cleanup
> -umount "$mnt"
> -rm -rf "$mnt"
>  echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages
>
>  run_test ./compaction_test
> --
> 2.37.3
>

Feel free to take:

Reviewed-by: Axel Rasmussen <axelrasmussen@...gle.com>