linux-kernel - Re: [PATCH] dax: integrate *sync code & multi-order radix tree

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Message-ID: <20160415201058.GA20412@linux.intel.com>
Date:	Fri, 15 Apr 2016 14:10:58 -0600
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	linux-fsdevel@...r.kernel.org, linux-nvdimm@...ts.01.org
Subject: Re: [PATCH] dax: integrate *sync code & multi-order radix tree

On Thu, Apr 14, 2016 at 03:03:24PM -0600, Ross Zwisler wrote:
> With the new addition of the multi-order radix tree support we can simplify
> the DAX *sync PMD support a bit.  Instead of manually checking to see if
> our index is covered by a PMD entry we can rely on the new radix tree to
> return the PMD entry if present.
> 
> Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>

Sorry, I should have explicitly called out that this patch (indeed, all
multi-order uses of the radix tree) need to be built upon the recent
multi-order fixes from Matthew and me:

https://lkml.org/lkml/2016/4/14/481

I've posted a working tree here:

https://git.kernel.org/cgit/linux/kernel/git/zwisler/linux.git/log/?h=dax_mo_radix

Thanks,
- Ross