From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.virtall.com ([178.63.195.102]:40784 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751517AbaDQJqy (ORCPT ); Thu, 17 Apr 2014 05:46:54 -0400 Date: Thu, 17 Apr 2014 10:46:50 +0100 From: Tomasz Chmielewski To: Cc: "linux-btrfs@vger.kernel.org" Subject: Re: filesystem hang when doing snapshot (3.15-rc1) Message-ID: <20140417104650.31531b12@s9> In-Reply-To: <534F3B60.3090109@cn.fujitsu.com> References: <20140416230511.1cbceb2c@virtall.com> <534F3B60.3090109@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Thu, 17 Apr 2014 10:24:32 +0800 Miao Xie wrote: > > scsi_request_fn+0x31/0x4dc [scsi_mod] [120462.559546] > > [] ? ktime_get_ts+0x50/0xb7 [120462.559594] > > [] ? delayacct_end+0x77/0x82 [120462.559641] > > [] ? __lock_page+0x63/0x63 [120462.559688] > > [] schedule+0x6a/0x6c [120462.559734] > > [] io_schedule+0x8a/0xc8 [120462.559780] > > [] sleep_on_page+0x9/0xd [120462.559827] > > [] __wait_on_bit_lock+0x43/0x8a [120462.559874] > > [] __lock_page+0x61/0x63 [120462.559921] > > [] ? wake_atomic_t_function+0x28/0x28 > > [120462.559969] [] find_lock_entry+0x39/0x5d > > [120462.560016] [] find_lock_page+0x9/0x16 > > It is very strange that we should be blocked here. Could you tell me > how to reproduce this problem? I'm not sure, sorry. It's just a routine cronjob: - rsync -> snapshot -> remove old snapshots -- Tomasz Chmielewski http://wpkg.org