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SubjectRe: [PATCH v2] selftests/sgx: Improve cgroup test scripts
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On Tue, 02 Apr 2024 02:43:25 -0500, Jarkko Sakkinen <jarkko@kernel.org>  
wrote:

> On Tue Apr 2, 2024 at 4:42 AM EEST, Haitao Huang wrote:
>> Make cgroup test scripts ash compatible.
>> Remove cg-tools dependency.
>> Add documentation for functions.
>>
>> Tested with busybox on Ubuntu.
>>
>> Signed-off-by: Haitao Huang <haitao.huang@linux.intel.com>
>> ---
>> v2:
>> - Fixes for v2 cgroup
>> - Turn off swapping before memcontrol tests and back on after
>> - Add comments and reformat
>> ---
>> tools/testing/selftests/sgx/ash_cgexec.sh | 57 ++++++
>> .../selftests/sgx/run_epc_cg_selftests.sh | 187 +++++++++++-------
>> .../selftests/sgx/watch_misc_for_tests.sh | 13 +-
>> 3 files changed, 179 insertions(+), 78 deletions(-)
>> create mode 100755 tools/testing/selftests/sgx/ash_cgexec.sh
>>
>> diff --git a/tools/testing/selftests/sgx/ash_cgexec.sh
>> b/tools/testing/selftests/sgx/ash_cgexec.sh
>> new file mode 100755
>> index 000000000000..9607784378df
>> --- /dev/null
>> +++ b/tools/testing/selftests/sgx/ash_cgexec.sh
>> @@ -0,0 +1,57 @@
>> +#!/usr/bin/env sh
>> +# SPDX-License-Identifier: GPL-2.0
>> +# Copyright(c) 2024 Intel Corporation.
>> +
>> +# Move the current shell process to the specified cgroup
>> +# Arguments:
>> +# $1 - The cgroup controller name, e.g., misc, memory.
>> +# $2 - The path of the cgroup,
>> +# relative to /sys/fs/cgroup for cgroup v2,
>> +# relative to /sys/fs/cgroup/$1 for v1.
>> +move_to_cgroup() {
>> + controllers="$1"
>> + path="$2"
>> +
>> + # Check if cgroup v2 is in use
>> + if [ ! -d "/sys/fs/cgroup/misc" ]; then
>> + # Cgroup v2 logic
>> + cgroup_full_path="/sys/fs/cgroup/${path}"
>> + echo $$ > "${cgroup_full_path}/cgroup.procs"
>> + else
>> + # Cgroup v1 logic
>> + OLD_IFS="$IFS"
>> + IFS=','
>> + for controller in $controllers; do
>> + cgroup_full_path="/sys/fs/cgroup/${controller}/${path}"
>> + echo $$ > "${cgroup_full_path}/tasks"
>> + done
>> + IFS="$OLD_IFS"
>> + fi
> I think that if you could point me to git v10 and all this I could
> then quite easily create test image and see what I get from that.
>
> I will code review the whole thing but this is definitely good
> enough to start testing this series properly! Thanks for the
> effort with this. The payback from this comes after the feature
> is mainline. We have now sort of reference of the usage patterns
> and less layers when we need to debug any possible (likely) bugs
> in the future.
>
> This is definitely to the right direction. I'm just wondering do
> we want to support v1 cgroups or would it make sense support only
> v2?
> BR, Jarkko
>
I can drop v1. I think most distro now support v2.
Created this branch to host these changes so far:
https://github.com/haitaohuang/linux/tree/sgx_cg_upstream_v10_plus


Thanks
Haitao

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