linux-kernel - Re: [PATCH v4 3/5] selftests/mm: call uffd_test_ctx

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Message-ID: <ZUAOsn9Fj/qCo+xg@x1n>
Date:   Mon, 30 Oct 2023 16:14:42 -0400
From:   Peter Xu <peterx@...hat.com>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     akpm@...ux-foundation.org, viro@...iv.linux.org.uk,
        brauner@...nel.org, shuah@...nel.org, aarcange@...hat.com,
        lokeshgidra@...gle.com, david@...hat.com, hughd@...gle.com,
        mhocko@...e.com, axelrasmussen@...gle.com, rppt@...nel.org,
        willy@...radead.org, Liam.Howlett@...cle.com, jannh@...gle.com,
        zhangpeng362@...wei.com, bgeffon@...gle.com,
        kaleshsingh@...gle.com, ngeoffray@...gle.com, jdduke@...gle.com,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH v4 3/5] selftests/mm: call uffd_test_ctx_clear at the end
 of the test

On Fri, Oct 27, 2023 at 05:38:13PM -0700, Suren Baghdasaryan wrote:
> uffd_test_ctx_clear() is being called from uffd_test_ctx_init() to unmap
> areas used in the previous test run. This approach is problematic because
> while unmapping areas uffd_test_ctx_clear() uses page_size and nr_pages
> which might differ from one test run to another.
> Fix this by calling uffd_test_ctx_clear() after each test is done.
> 
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>

Reviewed-by: Peter Xu <peterx@...hat.com>

-- 
Peter Xu