From: Mike Rapoport <rppt@kernel.org>
To: Pratyush Yadav <pratyush@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>,
Shuah Khan <shuah@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH 5/6] selftests/liveupdate: add test for operations on a preserved memfd
Date: Wed, 18 Mar 2026 09:38:13 +0200 [thread overview]
Message-ID: <abpWZZWaxUVg1HYd@kernel.org> (raw)
In-Reply-To: <20260309115441.266805-6-pratyush@kernel.org>
On Mon, Mar 09, 2026 at 11:54:38AM +0000, Pratyush Yadav wrote:
> From: "Pratyush Yadav (Google)" <pratyush@kernel.org>
>
> Once a memfd is preserved, certain operations are not allowed to
> succeed since they might make the state of the memfd inconsistent with
> the serialized state. Among these operations are truncating or growing
> the memfd. Writes and reads to already existing memfd should succeed.
>
> Add a test that makes sure a preserved memfd does not allow growing or
> shrinking, but does allow reads and writes to existing memory to go
> thorough.
>
> Signed-off-by: Pratyush Yadav <ptyadav@amazon.de>
> Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2026-03-18 7:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-09 11:54 [PATCH 0/6] selftests/liveupdate: add memfd tests Pratyush Yadav
2026-03-09 11:54 ` [PATCH 1/6] selftests/liveupdate: add framework for " Pratyush Yadav
2026-03-10 11:08 ` Usama Arif
2026-03-13 10:05 ` Pratyush Yadav
2026-03-18 7:15 ` Mike Rapoport
2026-03-09 11:54 ` [PATCH 2/6] selftests/liveupdate: add helper functions " Pratyush Yadav
2026-03-17 11:01 ` Mike Rapoport
2026-03-17 12:21 ` Pratyush Yadav
2026-03-18 7:20 ` Mike Rapoport
2026-03-09 11:54 ` [PATCH 3/6] selftests/liveupdate: add test for memfd content preservation Pratyush Yadav
2026-03-18 7:31 ` Mike Rapoport
2026-03-09 11:54 ` [PATCH 4/6] selftests/liveupdate: add test for zero-size memfd preservation Pratyush Yadav
2026-03-18 7:35 ` Mike Rapoport
2026-03-09 11:54 ` [PATCH 5/6] selftests/liveupdate: add test for operations on a preserved memfd Pratyush Yadav
2026-03-18 7:38 ` Mike Rapoport [this message]
2026-03-09 11:54 ` [PATCH 6/6] selftests/liveupdate: add fallocate test for memfd Pratyush Yadav
2026-03-18 7:43 ` Mike Rapoport
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