linux-kernel - Re: [PATCH v7 4/6] block: loop: prepare for supporing direct IO

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Date:	Mon, 27 Jul 2015 10:33:31 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Dave Chinner <david@...morbit.com>,
	Jens Axboe <axboe@...nel.dk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Justin M. Forbes" <jforbes@...oraproject.org>,
	Jeff Moyer <jmoyer@...hat.com>, Tejun Heo <tj@...nel.org>,
	linux-api@...r.kernel.org
Subject: Re: [PATCH v7 4/6] block: loop: prepare for supporing direct IO

On Mon, Jul 27, 2015 at 05:53:33AM -0400, Ming Lei wrote:
> Because size has to be 4k aligned too.

Yes.  But again I don't see any reason to limit us to a hardcoded 512
byte block size here, especially considering the patches to finally
allow enabling other block sizes from userspace.

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