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(localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id B9DD31FF87; Tue, 16 Jul 2019 15:01:43 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=mz7/qAWIZBgCxy/KQHnwd3kx6dvkYS2R0nAOMZwpcnc=; b=lO9SRqxtMYzubpB8KHB3tzm+dQIkcf3/WC7Aia5YfoZjHyWCBWQKdSIEHpFZ9u6/b7 lleANc7jnXUSXe3e17lSHFEH7xkLSO8a0rdgAHQkdBCqCzebIeA3gMIuk5ZuGrAorkZt 9PJ3iWIULeg3iJZ/VZbzhhOXFYR9HMGB9QWIxzOSY4QEXkSDGlf7HHLAujMTib3xr2V0 CNwNRmntUJoieNUdMUBcNJnsYV1xWXUwSrzzXJLsv/Z6shza1kCCEzjmLyDd9UqpLS+9 Z/IqUd+qHSEkR0cnpsrNb9IYN9EdtX/WSUzr7VeX+rNmYJxmlUOTKuZ/LyVO9N0hBy0H +v3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=mz7/qAWIZBgCxy/KQHnwd3kx6dvkYS2R0nAOMZwpcnc=; b=TDdBAASEMqeWP7dAwM/V6sQVANDuV8h4sFRG3fsDoTfLerIWLhuF+f6eEv4majfz0b YT8DitcN25GL8NdsftoU4wtNbmdjJsT2Q1eu5Xf/C7Ui/1TEvBiWEP9lupjGeyU1MxO4 GWO3JnJggISZB3wzop6u5Jys1iKcysiFrpsn14NEm9dvr1F3wvLsg8UkNrBV1RBU2Hr/ oOQdzDJH/HIedCRL+SXx6QjsdYPh+cRAoR0UgkSI51PY9hTqqqQEDuwA0LMeI4OYLdyy 1Eu8qSpjZfUf0+X1ueIADYWmVZCqOC1jAdt9fuyPIM30RjmuibNzIK61I9IZnzP/KvFU t+Iw== X-Gm-Message-State: APjAAAXmuBRmEVnLLsj331/rlBUEUROGhEuA9jarj9RSrztSvke4y08T IqQO41Y90KIKyJEpRr2bCsSa9Q== X-Google-Smtp-Source: APXvYqzKzCFo/FvuC1NLn+RQOY3+pKxdmEWKNhaivBU3mFAlWiBfXc7RsPC8Fki6/1H7FPNkvF926g== X-Received: by 2002:a1c:968c:: with SMTP id y134mr30300379wmd.75.1563285704980; Tue, 16 Jul 2019 07:01:44 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Date: Tue, 16 Jul 2019 15:01:33 +0100 Message-Id: <20190716140133.8578-1-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::343 Subject: [Qemu-devel] [RFC PATCH for 4.1] linux-user: unparent CPU object before unref X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: 1836558@bugs.launchpad.net, Riku Voipio , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Laurent Vivier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) When a CPU object is created it is parented during it's realize stage. If we don't unparent before the "final" unref we will never finzalize the object leading to a memory leak. For most setups you probably won't notice but with anything that creates and destroys a lot of threads this will add up. This goes especially for architectures which allocate a lot of memory in their CPU structures. Fixes: https://bugs.launchpad.net/qemu/+bug/1836558 Cc: 1836558@bugs.launchpad.net Signed-off-by: Alex Benn=C3=A9e --- linux-user/syscall.c | 1 + 1 file changed, 1 insertion(+) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 39a37496fed..4c9313fd9d0 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -7183,6 +7183,7 @@ static abi_long do_syscall1(void *cpu_env, int num, a= bi_long arg1, NULL, NULL, 0); } thread_cpu =3D NULL; + object_unparent(OBJECT(cpu)); object_unref(OBJECT(cpu)); g_free(ts); rcu_unregister_thread(); --=20 2.20.1