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[ Upstream commit209376ed2a] The hugetlb cgroup reservation test charge_reserved_hugetlb.sh assume that no cgroup filesystems are mounted before running the test. That is not true in many cases. As a result, the test fails to run. Fix that by querying the current cgroup mount setting and using the existing cgroup setup instead before attempting to freshly mount a cgroup filesystem. Similar change is also made for hugetlb_reparenting_test.sh as well, though it still has problem if cgroup v2 isn't used. The patched test scripts were run on a centos 8 based system to verify that they ran properly. Link: https://lkml.kernel.org/r/20220106201359.1646575-1-longman@redhat.com Fixes:29750f71a9("hugetlb_cgroup: add hugetlb_cgroup reservation tests") Signed-off-by: Waiman Long <longman@redhat.com> Acked-by: Mina Almasry <almasrymina@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Mike Kravetz <mike.kravetz@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.