From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
To: dave.hansen@intel.com
Cc: akpm@linux-foundation.org, koct9i@gmail.com,
fengguang.wu@intel.com, acme@redhat.com, bp@alien8.de,
kirill@shutemov.name, hannes@cmpxchg.org, rusty@rustcorp.com.au,
davem@davemloft.net, andres@2ndquadrant.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 1/3] replace PAGECACHE_TAG_* definition with enumeration
Date: Mon, 02 Jun 2014 12:37:32 -0400 [thread overview]
Message-ID: <538ca86b.a15cb40a.56e9.78fcSMTPIN_ADDED_BROKEN@mx.google.com> (raw)
In-Reply-To: <538CA269.6010300@intel.com>
On Mon, Jun 02, 2014 at 09:12:25AM -0700, Dave Hansen wrote:
> On 06/01/2014 10:24 PM, Naoya Horiguchi wrote:
> > -#define PAGECACHE_TAG_DIRTY 0
> > -#define PAGECACHE_TAG_WRITEBACK 1
> > -#define PAGECACHE_TAG_TOWRITE 2
> > +enum {
> > + PAGECACHE_TAG_DIRTY,
> > + PAGECACHE_TAG_WRITEBACK,
> > + PAGECACHE_TAG_TOWRITE,
> > + __NR_PAGECACHE_TAGS,
> > +};
>
> Doesn't this end up exposing kernel-internal values out to a userspace
> interface? Wouldn't that lock these values in to the ABI?
Yes, that would. I hope these PAGECACHE_TAG_* stuff is very basic
things and will never change drastically in the future (only added),
so it's unlikely to bother people about ABI breakage things.
Thanks,
Naoya Horiguchi
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next prev parent reply other threads:[~2014-06-02 16:38 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-21 2:26 [PATCH 0/4] pagecache scanning with /proc/kpagecache Naoya Horiguchi
2014-05-21 2:26 ` [PATCH 1/4] radix-tree: add end_index to support ranged iteration Naoya Horiguchi
2014-05-21 8:21 ` Konstantin Khlebnikov
2014-05-21 19:26 ` Naoya Horiguchi
2014-05-21 2:26 ` [PATCH 2/4] fs/proc/page.c: introduce /proc/kpagecache interface Naoya Horiguchi
2014-05-21 2:26 ` [PATCH 3/4] tools/vm/page-types.c: rework on file cache scanning mode Naoya Horiguchi
2014-05-21 2:26 ` [PATCH 4/4] Documentation: update Documentation/vm/pagemap.txt Naoya Horiguchi
2014-05-21 22:42 ` [PATCH 0/4] pagecache scanning with /proc/kpagecache Andrew Morton
2014-05-22 2:19 ` Naoya Horiguchi
[not found] ` <537d5ee4.4914e00a.5672.ffff85d5SMTPIN_ADDED_BROKEN@mx.google.com>
2014-05-22 2:33 ` Andrew Morton
2014-05-22 9:50 ` Konstantin Khlebnikov
2014-05-22 10:36 ` Kirill A. Shutemov
2014-05-22 17:47 ` Naoya Horiguchi
2014-05-22 21:02 ` Naoya Horiguchi
2014-06-02 5:24 ` [RFC][PATCH 0/3] mm: introduce fincore() Naoya Horiguchi
2014-06-02 5:24 ` [PATCH 1/3] replace PAGECACHE_TAG_* definition with enumeration Naoya Horiguchi
2014-06-02 16:12 ` Dave Hansen
2014-06-02 16:37 ` Naoya Horiguchi [this message]
[not found] ` <1401727052-f7v7kykv@n-horiguchi@ah.jp.nec.com>
2014-06-02 16:45 ` Dave Hansen
2014-06-02 17:14 ` Naoya Horiguchi
2014-06-02 18:19 ` Dave Hansen
2014-06-02 18:48 ` Naoya Horiguchi
2014-06-02 21:16 ` Andrew Morton
2014-06-02 21:51 ` Naoya Horiguchi
2014-06-02 5:24 ` [PATCH 2/3] mm: introduce fincore() Naoya Horiguchi
2014-06-02 6:42 ` Christoph Hellwig
2014-06-02 14:19 ` Naoya Horiguchi
2014-06-02 7:06 ` Michael Kerrisk
2014-06-02 14:21 ` Naoya Horiguchi
2014-06-02 12:23 ` Kirill A. Shutemov
2014-06-02 14:52 ` Naoya Horiguchi
2014-06-02 16:11 ` Dave Hansen
2014-06-02 16:22 ` Naoya Horiguchi
2014-06-02 5:24 ` [PATCH 3/3] selftest: add test code for fincore() Naoya Horiguchi
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