Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use bdev->bd_queue

From	Christoph Hellwig <hch@lst.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use bdev->bd_queue
Date	2017-01-10 17:00 +0100
Message-ID	<sY70b-3cI-5@gated-at.bofh.it> (permalink)
References	<sWrFE-2MO-9@gated-at.bofh.it> <sWzWy-nl-19@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Jan 06, 2017 at 11:23:30AM +0100, Jan Kara wrote:
> So what I think needs to be done is that we make backing_dev_info
> independently allocated structure with different lifetime rules to gendisk
> or request_queue - definitely I want it to live as long as block device
> inode exists. However it needs more thought what the exact lifetime rules
> will be.

Yes, moving the backing dev out (or keeping the request_queue memoery alive)
is something we need to do.  And we need to look into the other half
of the backing_dev life time isssues - we need to make sure the name
and sysfs resources are released as soon as the devices goes away so that
we aren't going to run into reuse races.

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[PATCH] block: fix blk_get_backing_dev_info() crash,  use bdev->bd_queue Dan Williams <dan.j.williams@intel.com> - 2017-01-06 02:40 +0100
  Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use  bdev->bd_queue Jan Kara <jack@suse.cz> - 2017-01-06 11:30 +0100
    Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use bdev->bd_queue Dan Williams <dan.j.williams@intel.com> - 2017-01-06 18:50 +0100
      Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use  bdev->bd_queue Jan Kara <jack@suse.cz> - 2017-01-08 20:50 +0100
        Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use bdev->bd_queue Dan Williams <dan.j.williams@intel.com> - 2017-01-08 22:00 +0100
          Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use bdev->bd_queue Dan Williams <dan.j.williams@intel.com> - 2017-01-10 03:10 +0100
    Re: [PATCH] block: fix blk_get_backing_dev_info() crash, use         bdev->bd_queue Christoph Hellwig <hch@lst.de> - 2017-01-10 17:00 +0100

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