selftests/filesystems: check that reading the root of an empty mount namespace stalls nobody

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A readdir of the root of an empty mount namespace stuck in the page
fault of its buffer must stall neither a create nor a lookup in that
directory. The test needs userfaultfd and skips without it.

Link: https://patch.msgid.link/20261002-work-mount-fixes-4-v1-21-dd44b89d44ce@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

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Christian Brauner 2026-10-02 15:52:52 +02:00

parent fa15a241f0

commit 098bf3be6c

3 changed files with 50 additions and 1 deletions

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tools/testing/selftests/filesystems/empty_mntns/.gitignore vendored

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tools/testing/selftests/filesystems/empty_mntns/Makefile

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45

tools/testing/selftests/filesystems/empty_mntns/root_readdir_test.c

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