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Date:   Tue, 5 Dec 2017 18:27:13 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Dave Chinner <david@...morbit.com>
Cc:     Matthew Wilcox <mawilcox@...rosoft.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Jens Axboe <axboe@...nel.dk>,
        Rehas Sachdeva <aquannie@...il.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-f2fs-devel@...ts.sourceforge.net" 
        <linux-f2fs-devel@...ts.sourceforge.net>,
        "linux-nilfs@...r.kernel.org" <linux-nilfs@...r.kernel.org>,
        "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>,
        "linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 00/73] XArray version 4

On Wed, Dec 06, 2017 at 01:17:52PM +1100, Dave Chinner wrote:
> On Wed, Dec 06, 2017 at 01:53:41AM +0000, Matthew Wilcox wrote:
> > Huh, you've caught a couple of problems that 0day hasn't sent me yet.  Try turning on DAX or TRANSPARENT_HUGEPAGE.  Thanks!
> 
> Dax is turned on, CONFIG_TRANSPARENT_HUGEPAGE is not.
> 
> Looks like nothing is setting CONFIG_RADIX_TREE_MULTIORDER, which is
> what xas_set_order() is hidden under.
> 
> Ah, CONFIG_ZONE_DEVICE turns it on, not CONFIG_DAX/CONFIG_FS_DAX.
> 
> Hmmmm.  That seems wrong if it's used in fs/dax.c...

Yes, it's my mistake for not making xas_set_order available in the
!MULTIORDER case.  I'm working on a fix now.

> What a godawful mess Kconfig has turned into.

I'm not going to argue with that ...

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