linux-kernel - Re: [PATCHSET 0/5 v2] brd: partition fixes

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Message-ID: <87wq9u7x77.fsf@openvz.org>
Date:	Wed, 27 Aug 2014 19:45:48 +0400
From:	Dmitry Monakhov <dmonakhov@...nvz.org>
To:	Boaz Harrosh <boaz@...xistor.com>, Jens Axboe <axboe@...com>,
	Matthew Wilcox <willy@...ux.intel.com>
Cc:	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCHSET 0/5 v2] brd: partition fixes

On Wed, 27 Aug 2014 18:22:21 +0300, Boaz Harrosh <boaz@...xistor.com> wrote:
> Jens Hi
> 
> What do you intend to do with these fixes? These are real bugs on devices
> shipped for a while now. I think they need to go into current 3.17-rcX Kernel.
> 
> If not then lets please put them in for-next
> [This set is for linux-block.git/for-next, tell me if you need one ontop
>  of for-linus]
> 
It looks like I've missed your context. Please elaborate your use-case
> [v2]
> Based on Jens's linux-next [30e996a] incorporating the brd patch by Dmitry Monakhov.
> Dmitry has introduced a new part_show parameter, this parameter is now
> removed
  In which commit or kernel-tree this parameter was removed?
> and we always "part_show=1".
> Scripts that did part_show=1 will work just the same but will display a
> message in logs. This is harmless. (And scripts can be modified to
> remove this parameter)
  Which script are you talking about? Why you want use it?

> 
> [v1]
> Current situation is that any attempt to use partitions with brd device would
> create the partition but then any use will trash the data.
> 
> See: http://www.spinics.net/lists/linux-scsi/msg76737.html
> 
> So these patches fixes up all the problems we saw with the code, but not sacrificing
> any of the old fixtures. See [patch 4/5] for more explanations.
> 
> list of patches:
> [PATCH 1/5] axonram: Fix bug in direct_access
> [PATCH 2/5] Change direct_access calling convention
> 
>     These are Matthew's patches from the DAX series which fixes the interface to
>     direct_access taking into account the partition offset. It must be applied
>     here for partitions to work with direct_access() API.
> 
> [PATCH 3/5] brd: Add getgeo to block ops
> 
>     This one is needed by fdisk, otherwise it just asks extra questions
> 
> [PATCH 4/5] brd: Fix all partitions BUGs
> [PATCH 5/5] brd: Request from fdisk 4k alignment
> 
> Thanks
> Boaz
> 
> 
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