From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
To: Dave Chinner <david@fromorbit.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Konstantin Khlebnikov <koct9i@gmail.com>,
Wu Fengguang <fengguang.wu@intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Borislav Petkov <bp@alien8.de>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Johannes Weiner <hannes@cmpxchg.org>,
Rusty Russell <rusty@rustcorp.com.au>,
David Miller <davem@davemloft.net>,
Andres Freund <andres@2ndquadrant.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Dave Hansen <dave.hansen@intel.com>,
Christoph Hellwig <hch@infradead.org>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Linux API <linux-api@vger.kernel.org>,
Naoya Horiguchi <nao.horiguchi@gmail.com>
Subject: Re: [PATCH v2 1/4] define PAGECACHE_TAG_* as enumeration under include/uapi
Date: Thu, 3 Jul 2014 21:41:51 -0400 [thread overview]
Message-ID: <20140704014151.GA9869@nhori> (raw)
In-Reply-To: <20140704011639.GG9508@dastard>
On Fri, Jul 04, 2014 at 11:16:39AM +1000, Dave Chinner wrote:
> On Thu, Jul 03, 2014 at 05:52:12PM -0400, Naoya Horiguchi wrote:
> > We need the pagecache tags to be exported to userspace later in this
> > series for fincore(2), so this patch moves the definition to the new
> > include file for preparation. We also use the number of pagecache tags,
> > so this patch also adds it.
> >
> > Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
>
> NACK.
>
> The radix tree tags are deeply internal implementation details.
> They are an artifact of the current mark-and-sweep writeback
> algorithm, and as such should never, ever be exposed to userspace,
> let alone fixed in an ABI we need to support forever more.
Hm, OK, so I'll do whole this series without pagecache tag things.
Thanks,
Naoya Horiguchi
next prev parent reply other threads:[~2014-07-04 1:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-03 21:52 [PATCH 0/4] mm: introduce fincore() v2 Naoya Horiguchi
2014-07-03 21:52 ` [PATCH v2 1/4] define PAGECACHE_TAG_* as enumeration under include/uapi Naoya Horiguchi
2014-07-04 1:16 ` Dave Chinner
2014-07-04 1:41 ` Naoya Horiguchi [this message]
2014-07-03 21:52 ` [PATCH v2 2/4] mm: introduce fincore() Naoya Horiguchi
2014-07-04 10:12 ` Christoph Hellwig
2014-07-04 15:15 ` Cédric Villemain
2014-07-04 16:31 ` Naoya Horiguchi
2014-07-03 21:52 ` [PATCH v2 3/4] selftests/fincore: add test code for fincore() Naoya Horiguchi
2014-07-03 21:52 ` [PATCH v2 4/4] man2/fincore.2: document general description about fincore(2) Naoya Horiguchi
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