linux-kernel - [PATCH 0/2] selftests/mm: fix deadlock after pthread

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Message-ID: <20241003211716.371786-1-edliaw@google.com>
Date: Thu,  3 Oct 2024 21:17:09 +0000
From: Edward Liaw <edliaw@...gle.com>
To: linux-kselftest@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, 
	Shuah Khan <shuah@...nel.org>, Lokesh Gidra <lokeshgidra@...gle.com>, 
	Edward Liaw <edliaw@...gle.com>, Peter Xu <peterx@...hat.com>
Cc: linux-kernel@...r.kernel.org, kernel-team@...roid.com, linux-mm@...ck.org
Subject: [PATCH 0/2] selftests/mm: fix deadlock after pthread_create

On Android arm, pthread_create followed by a fork caused a deadlock in
the case where the fork required work to be completed by the created
thread.

Updated the synchronization primitive to use pthread_barrier instead of
atomic_bool.

Applied the same fix to the wp-fork-with-event test.

Edward Liaw (2):
  selftests/mm: replace atomic_bool with pthread_barrier_t
  selftests/mm: fix deadlock for fork after pthread_create on ARM

 tools/testing/selftests/mm/uffd-common.c     |  5 +++--
 tools/testing/selftests/mm/uffd-common.h     |  3 +--
 tools/testing/selftests/mm/uffd-unit-tests.c | 21 ++++++++++++++------
 3 files changed, 19 insertions(+), 10 deletions(-)

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2.46.1.824.gd892dcdcdd-goog