From mboxrd@z Thu Jan 1 00:00:00 1970 References: <6cfeccb2-b3f6-dbd0-f5b8-b5e79a25baf8@strike.wu.ac.at> From: Zdenek Kabelac Message-ID: Date: Mon, 13 Nov 2017 15:51:21 +0100 MIME-Version: 1.0 In-Reply-To: <6cfeccb2-b3f6-dbd0-f5b8-b5e79a25baf8@strike.wu.ac.at> Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [linux-lvm] LVM hangs Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: LVM general discussion and development , Alexander 'Leo' Bergolth Dne 13.11.2017 v 14:41 Alexander 'Leo' Bergolth napsal(a): > Hi! > > I have a EL7 desktop box with two sata harddisks and two ssds in a > LVM raid1 - thin pool - cache configuration. (Just migrated to this > setup a few weeks ago.) > > After some days, individual processes start to block in disk wait. > I don't know if the problem resides in the cache-, thin- or raid1-layer > but the underlying block-devices are fully responsive. > > I have prepared some info at: > http://leo.kloburg.at/tmp/lvm-blocks/ > > Do the stack backtraces provide enough information to locate the source > of the blocks? > > I'd be happy to provide additional info, if necessary. > Meanwhile I'll disable the LVM cache layer to eliminate this potential > candidate. > Hi It would be probably nice to see the result of 'dmsetup status' I'd have guessed you are probably hitting 'frozen' raid state which is unfortunate existing upstream bug. Regards Zdenek