From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamie Huang Subject: RT throttling and mmc hardware interrupt timeout Date: Sat, 12 Nov 2016 17:56:32 +0800 Message-ID: <20161112175632.310c819a@JAMIE> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from m12-15.163.com ([220.181.12.15]:34037 "EHLO m12-15.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752476AbcKLJ5Q (ORCPT ); Sat, 12 Nov 2016 04:57:16 -0500 Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org Hi all: Recently, I do test with btrfs filesystem on emmc. When I see the message "sched: RT throttling activated", uart, network and other peripherals are not responding. But, the timer is ok, so I can see the following messages: "mmc0: Timeout waiting for hardware interrupt." again and again. Finally, "I/O error" messages are coming and the btrfs filesystem crashes. I think, because I use threadirqs, so most irqs are processed in threads, yes, RT threads. When "sched: RT throttling activated" comes out, RT threads can not be execute for some time, so, we can see mmc interrupt timeout message. My kernel version is 3.10.55, I know that's very old. Still, I want to know, is there any patch for this problem? Or does any one encounter the same problem? Thank you.