linux-kernel - Re: [PATCH 0/8] Support multi-order entries in the radix tree

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Message-Id: <20160121162841.9116af529b6ce0ce6b00aefc@linux-foundation.org>
Date:	Thu, 21 Jan 2016 16:28:41 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Matthew Wilcox <matthew.r.wilcox@...el.com>
Cc:	Johannes Weiner <hannes@...xchg.org>,
	Matthew Wilcox <willy@...ux.intel.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, Shuah Khan <shuahkh@....samsung.com>
Subject: Re: [PATCH 0/8] Support multi-order entries in the radix tree

On Tue, 19 Jan 2016 09:25:25 -0500 Matthew Wilcox <matthew.r.wilcox@...el.com> wrote:

> Before diving into the important modifications, I add Andrew Morton's
> radix tree test harness to the tree in patches 1 & 2.  It was absolutely
> invaluable in catching some of my bugs.

(cc Shuah for tools/testing/selftests)

Cool, thanks for doing that.  I think a lot of this came from Nick Piggin
a long time ago, but I was bad about attributing it.

I wonder how good the coverage is - I don't think it's been seriously
updated since 2010 and presumably it isn't hitting on later-added
features.  Doesn't matter - someone will add things later if needed. 
And when I bug them to update the test harness ;) 

I don't think it will link on my system - I have no liburcu by default.
I wonder if this will break lots of people's "make kselftest".

I'll get all this into -next tomorrow.  Hopefully Ross will have time
to go through it sometime (non-urgently - it's 4.6 stuff).