linux-kernel - Re: [PATCH 1/2] Add partition resize function to BLKPG ioctl

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Message-ID: <4EF13C30.4050307@cfl.rr.com>
Date:	Tue, 20 Dec 2011 20:53:52 -0500
From:	Phillip Susi <psusi@....rr.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	joe@...ches.com, kzak@...hat.com, linux-kernel@...r.kernel.org,
	jaxboe@...ionio.com
Subject: Re: [PATCH 1/2] Add partition resize function to BLKPG ioctl

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On 12/19/2011 03:25 PM, Vivek Goyal wrote:
> Are there any restrictions on order of partition bdev and disk bdev
> locking.

Good point, yes, it seems you need to take the partition first.  Now that I think about it though, I don't think we need the disk mutex at all.  I thought you needed to hold it in order to iterate over the partitions, but it looks like you don't since that uses an RCU, right?

I guess we'll go for another try.
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