From: Tejun Heo <tj@kernel.org>
To: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: axboe@fb.com, jack@suse.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@lst.de>, "Theodore Ts'o" <tytso@mit.edu>
Subject: Re: BUG: Unable to handle kernel paging request for data at address __percpu_counter_add
Date: Mon, 23 Nov 2015 16:13:22 -0500 [thread overview]
Message-ID: <20151123211322.GD19072@mtj.duckdns.org> (raw)
In-Reply-To: <564DA363.9060303@linux.vnet.ibm.com>
Hello,
On Thu, Nov 19, 2015 at 03:54:35PM +0530, Raghavendra K T wrote:
> While I was creating thousands of docker container on a power8 baremetal
> (config: 4.3.0 kernel 1TB RAM, 20core (=160 cpu) system. After creating
> around 5600 container
> I have hit below problem.
> [This is looking similar to
> https://bugzilla.kernel.org/show_bug.cgi?id=101011, but
> kernel had Revert "ext4: remove block_device_ejected" (bdfe0cbd746aa9) since
> it is 4.3.0 tagged kernel]
>
> Any hints on how to go about the fix. Please let me know if you think any
> more information needed.
>
> docker daemon is device mapper based. (and it took a day to recreate the
> problem)
>
> [ by disabling CONFIG_BLK_CGROUP and CONFIG_CGROUP_WRITEBACK I am able to
> create 10k containers without any problem]
Could be the same problem that Ilya is trying to fix. ie. blkdev i_wb
pointing to a stale wb. Can you please see whether the following
patch resolves the issue?
http://lkml.kernel.org/g/1448054554-24138-1-git-send-email-idryomov@gmail.com
Thanks.
--
tejun
next prev parent reply other threads:[~2015-11-23 21:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-19 10:24 Raghavendra K T
2015-11-23 21:13 ` Tejun Heo [this message]
2015-11-24 6:05 ` Raghavendra K T
2015-11-30 7:18 ` Raghavendra K T
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