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Date:   Thu, 13 Apr 2017 21:44:58 +0800
From:   Ming Lei <>
To:     Johannes Thumshirn <>
Cc:     Jens Axboe <>, Omar Sandoval <>,
        Bart Van Assche <>,
        Hannes Reinecke <>, Christoph Hellwig <>,
        Linux Block Layer Mailinglist <>,
        Linux Kernel Mailinglist <>
Subject: Re: [PATCH] block: bios with an offset are always gappy

On Thu, Apr 13, 2017 at 02:20:10PM +0200, Johannes Thumshirn wrote:
> On Thu, Apr 13, 2017 at 08:11:40PM +0800, Ming Lei wrote:
> > Ok, could you apply the attached debug patch and collect the
> > ftrace log? (ftrace_dump_on_oops need to be passed to kernel cmd line).

Thanks Johannes very much for collecting the log.

The root cause should be the following:

	- if 'offset' of one segment isn't zero, we can't make that segment
	  at full size, otherwise the segment ends in the unaligned
	  virt boundary.

Give me a while, I will figure out one patch to address the issue.


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