linux-kernel - Re: [PATCH 3/3] selftests/mm/guard-regions: add smaps visibility test

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Message-ID: <034da71d-7c13-4638-bc61-35888e35510d@lucifer.local>
Date: Thu, 30 Oct 2025 08:25:59 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Suren Baghdasaryan <surenb@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Corbet <corbet@....net>, David Hildenbrand <david@...hat.com>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
        Michal Hocko <mhocko@...e.com>, Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Jann Horn <jannh@...gle.com>, Pedro Falcato <pfalcato@...e.de>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-mm@...ck.org,
        linux-trace-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Andrei Vagin <avagin@...il.com>
Subject: Re: [PATCH 3/3] selftests/mm/guard-regions: add smaps visibility test

On Wed, Oct 29, 2025 at 09:40:19PM -0700, Suren Baghdasaryan wrote:
> On Wed, Oct 29, 2025 at 9:51 AM Lorenzo Stoakes
> <lorenzo.stoakes@...cle.com> wrote:
> >
> > Assert that we observe guard regions appearing in /proc/$pid/smaps as
> > expected, and when split/merge is performed too (with expected sticky
> > behaviour).
> >
> > Also add handling for file systems which don't sanely handle mmap() VMA
> > merging so we don't incorrectly encounter a test failure in this situation.
> >
> > Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
>
> Reviewed-by: Suren Baghdasaryan <surenb@...gle.com>

Thanks!