From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Rowe Subject: Re: megasas stops I/O when running kernel as dom0 under xen4.1/4.2 Date: Fri, 12 Aug 2011 10:02:38 +0100 Message-ID: <201108121002.38279.simon.rowe@eu.citrix.com> References: <4E43E04B.8010401@leuphana.de> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4E43E04B.8010401@leuphana.de> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com Cc: Andreas Olsowski List-Id: xen-devel@lists.xenproject.org I've now reproduced this on a Dell R905 (16 cores, 265GB) which also has a MegaRAID SAS 1078, Simon INFO: task kjournald:1691 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kjournald D 00003b87 0 1691 2 0x00000000 eac3fed4 00000246 e92f92b8 00003b87 00000001 00000000 c16cc580 eac3fe74 7ea17f6b 00003b72 ebd2b954 ebd2b844 ebd2b7b0 ebd2b954 c16cc100 00000001 d3aad740 c0122a72 c16cc138 0002a01a 00000000 00000005 01038103 00008888 Call Trace: [] ? update_curr+0x72/0xf0 [] ? prepare_to_wait+0x4c/0x60 [] journal_commit_transaction+0x12c/0x1060 [jbd] [] ? schedule+0x2e9/0x970 [] ? autoremove_wake_function+0x0/0x50 [] ? try_to_del_timer_sync+0x54/0x80 [] kjournald+0xc0/0x240 [jbd] [] ? autoremove_wake_function+0x0/0x50 [] ? kjournald+0x0/0x240 [jbd] [] kthread+0x74/0x80 [] ? kthread+0x0/0x80 [] kernel_thread_helper+0x7/0x10 ... sd 0:2:0:0: [sda] megasas: RESET -46318 cmd=2a retries=0 megaraid_sas: HBA reset handler invoked without an internal reset condition. megaraid_sas: no more pending commands remain after reset handling. megasas: reset successful