From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail3-164.sinamail.sina.com.cn (mail3-164.sinamail.sina.com.cn [202.108.3.164]) (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 42FF23590A3 for ; Mon, 12 Jan 2026 13:38:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.164 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768225120; cv=none; b=kauFuVwPiIdJdDZEEiAUQmUayQp4g/L5Gt1WYDI2ThqRqfQr6wZGmXcn/uEQezsFRx3HYjGzq1XI9dafdNVYgR/tSwtICdSSKDBL/CflVvFeJ6puDFAPv1de37fzZ/oYASLk0DjUEU8Yf7yd/Bh05M8L8lzVW+Z/Ea8xSsJG5Sc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768225120; c=relaxed/simple; bh=1C6vLGszTVJQxqQICU08Yqidg2pugvxj9nhV4aUcX5E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gWcmJlvAd4toPB0pc4nWHejLSe+Xg2hTeDj8XLsBoDcnB78wNjvdWZZwOqWPlJgJUADMmU1VWAvdT6ag56Q+3oSwDI0ZlAa5Heb56Sa03I1o5m8GU9P6pNYoSV5HkRfJLqycVjGL2w2n9X93JySONXnQ4J/GOXzUe9ahXJuBg9g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=EeYD3Pxd; arc=none smtp.client-ip=202.108.3.164 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="EeYD3Pxd" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1768225116; bh=sCfWFscWKDhy+cPYbfvIWomaGYCmFK7y0R1EiMwaCLI=; h=From:Subject:Date:Message-ID; b=EeYD3Pxdqci0BkbW6Sk5pKfmVlgZrnVWJ42Zo+uDT49rSExsJOO2ZKZyxalP5992t Uq+oSmT5nTIxtQ/DdIkOyBeGAOuo9qyicL1De/lE9hRr4WZLxT4wajDAd8U/M2L2Qg D+d5nzLG52igv8mDZE7T4jVReM0OuJ0TzezNxaNs= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.58.160]) by sina.com (10.54.253.32) with ESMTP id 6964F94F000019CB; Mon, 12 Jan 2026 21:38:25 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 5717074456672 X-SMAIL-UIID: E3D100460EB94DECAB4859F73DA2DC40-20260112-213825-1 From: Hillf Danton To: kartikey406@gmail.com Cc: syzbot , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, urezki@gmail.com Subject: Re: [syzbot] [mm?] INFO: rcu detected stall in purge_vmap_node Date: Mon, 12 Jan 2026 21:38:13 +0800 Message-ID: <20260112133815.2190-1-hdanton@sina.com> In-Reply-To: <6964f35e.050a0220.eaf7.00a5.GAE@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Date: Mon, 12 Jan 2026 05:13:02 -0800 > Hello, > > syzbot has tested the proposed patch but the reproducer is still triggering an issue: > INFO: rcu detected stall in x64_sys_call > Given the test result of your patch, can you specify the root cause of the stall reported, Deepanshu?