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Tue, 25 Mar 2025 15:20:08 -0700 (PDT) Received: from c7-smtp-2023.dev.purestorage.com ([2620:125:9017:12:36:3:5:0]) by smtp-relay.gmail.com with ESMTPS id 00721157ae682-700ba82d5a9sm3786797b3.46.2025.03.25.15.20.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Mar 2025 15:20:08 -0700 (PDT) X-Relaying-Domain: purestorage.com Received: from dev-ushankar.dev.purestorage.com (dev-ushankar.dev.purestorage.com [10.7.70.36]) by c7-smtp-2023.dev.purestorage.com (Postfix) with ESMTP id 5B1ED3404E1; Tue, 25 Mar 2025 16:20:06 -0600 (MDT) Received: by dev-ushankar.dev.purestorage.com (Postfix, from userid 1557716368) id 4E772E415C9; Tue, 25 Mar 2025 16:20:06 -0600 (MDT) From: Uday Shankar Date: Tue, 25 Mar 2025 16:19:33 -0600 Subject: [PATCH 3/4] selftests: ublk: kublk: ignore SIGCHLD Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250325-ublk_timeout-v1-3-262f0121a7bd@purestorage.com> References: <20250325-ublk_timeout-v1-0-262f0121a7bd@purestorage.com> In-Reply-To: <20250325-ublk_timeout-v1-0-262f0121a7bd@purestorage.com> To: Ming Lei , Shuah Khan , Jens Axboe Cc: linux-block@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Uday Shankar X-Mailer: b4 0.14.2 SIGCHLD from exiting children can arrive during io_uring_wait_cqe and cause it to return early with -EINTR. Since we don't have a handler for SIGCHLD, avoid this issue by ignoring SIGCHLD. Signed-off-by: Uday Shankar Reviewed-by: Ming Lei --- tools/testing/selftests/ublk/kublk.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/ublk/kublk.c b/tools/testing/selftests/ublk/kublk.c index ded1b93e7913011499ae5dae7b40f0e425982ee4..064a5bb6f12f35892065b8dfacb6f57f6fc16aee 100644 --- a/tools/testing/selftests/ublk/kublk.c +++ b/tools/testing/selftests/ublk/kublk.c @@ -890,6 +890,7 @@ static int cmd_dev_add(struct dev_ctx *ctx) exit(-1); } + signal(SIGCHLD, SIG_IGN); setsid(); res = fork(); if (res == 0) {