From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30EF12D97A6; Tue, 28 Oct 2025 08:47:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761641234; cv=none; b=YTYAWBC8mT90o4DUnsqtXWeY49PlCcjXJKRybgjx3OTTO6j899Z2nA7trRPjMNatzcB5BHG4BrPcKP4p/4KI71+NnA33gWa9WTA1SML4oxm88t1RLzT8niKGmxIUIswDIbYEhUdUGy9MWZuvBdAUgfkavD3Y0VM2PGr/qcP0p2c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761641234; c=relaxed/simple; bh=WXvJOQc/1nKleY4xLz7bcXslIdmWnEGWuNhG++Sv6j0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=CQR0AeFFHa51nMSqG+Y3kdGJjWLjAQUN9sll5BfRJOkPGmXijZj2koGsgLFll8ywsnt/UymAnQ1Xo49j2LOB1ZQcsQFm8UGWnolQoGnHbBmdazIupJ3rfxJb5YiZp2NCwfEQ5lyUx1p/zaKLLiQCu+fWmTrxwHnEmbJpvef+2BI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YdF9UdGy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YdF9UdGy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 06795C4CEE7; Tue, 28 Oct 2025 08:47:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761641232; bh=WXvJOQc/1nKleY4xLz7bcXslIdmWnEGWuNhG++Sv6j0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=YdF9UdGy6hy3lYDHW0ikUGuAZ1p0YpfbJUGM79DTRT7GC2NLqCmTH+0lAEe4qSW++ DsXOauAc4WRiT3hYN3H2TLxlkRKuBAaEZukJdo9eVvoaZNeXoy2m0kp+s2Qtc/szEj MNuAmXDi4GG2r7uQn7Y5WZ9IkIw7aBo2o4f/yKMWYZml4SGM2/vth+OS9PLYW46rW1 Ppfvp/Q7nqYizsqlbAhZfSIQR3qhj6rVdvGtIO8f1j2C+n0Kpi+TvpJtgvMocgbc+n piUt5su/LAn/EtpBb0vZ7x+OCZc2RXK2Os7UnqLejFf8cdZ47tUTAmz53Eu6Rez1qh 7sVyzBRWJsKpQ== From: Christian Brauner Date: Tue, 28 Oct 2025 09:46:01 +0100 Subject: [PATCH 16/22] selftests/coredump: handle edge-triggered epoll correctly Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251028-work-coredump-signal-v1-16-ca449b7b7aa0@kernel.org> References: <20251028-work-coredump-signal-v1-0-ca449b7b7aa0@kernel.org> In-Reply-To: <20251028-work-coredump-signal-v1-0-ca449b7b7aa0@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Oleg Nesterov , Amir Goldstein , Aleksa Sarai , Yu Watanabe , Josef Bacik , Jeff Layton , Jann Horn , Luca Boccassi , Alexander Mikhalitsyn , linux-kernel@vger.kernel.org, Alexander Viro , Jan Kara , Lennart Poettering , Mike Yuan , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=1000; i=brauner@kernel.org; h=from:subject:message-id; bh=WXvJOQc/1nKleY4xLz7bcXslIdmWnEGWuNhG++Sv6j0=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQyNB1q+n72562Fa80nsn8JOFxRvFz57r3kE1M1JL4x+ oqLPc7d21HKwiDGxSArpsji0G4SLrecp2KzUaYGzBxWJpAhDFycAjCRh1GMDE83S4g8Onv04WvT XWbxng///frYyXP2kqxk6KGZ6X+y4qMZ/gckHfornnWZe0t897OlGtLn5ORkbh07t1Tu1Q2m2sP 3WzkA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 by putting the file descriptor into non-blocking mode. Signed-off-by: Christian Brauner --- tools/testing/selftests/coredump/coredump_test_helpers.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/testing/selftests/coredump/coredump_test_helpers.c b/tools/testing/selftests/coredump/coredump_test_helpers.c index 7512a8ef73d3..116c797090a1 100644 --- a/tools/testing/selftests/coredump/coredump_test_helpers.c +++ b/tools/testing/selftests/coredump/coredump_test_helpers.c @@ -291,6 +291,14 @@ void process_coredump_worker(int fd_coredump, int fd_peer_pidfd, int fd_core_fil int epfd = -1; int exit_code = EXIT_FAILURE; struct epoll_event ev; + int flags; + + /* Set socket to non-blocking mode for edge-triggered epoll */ + flags = fcntl(fd_coredump, F_GETFL, 0); + if (flags < 0) + goto out; + if (fcntl(fd_coredump, F_SETFL, flags | O_NONBLOCK) < 0) + goto out; epfd = epoll_create1(0); if (epfd < 0) -- 2.47.3