From: Christoph Lameter <clameter@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: apw@shadowen.org
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: linux-mm@kvack.org
Subject: [rfc 05/10] Pageflags: Eliminate PG_xxx aliases
Date: Mon, 03 Mar 2008 16:04:57 -0800 [thread overview]
Message-ID: <20080304000733.255900083@sgi.com> (raw)
In-Reply-To: 20080304000452.514878384@sgi.com
[-- Attachment #1: pageflags-eliminate-aliases --]
[-- Type: text/plain, Size: 2965 bytes --]
Remove aliases of PG_xxx. We can easily drop those now and alias by specifying
the PG_xxx flag in the macro that generates the functions.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
include/linux/page-flags.h | 10 +++-------
mm/page_alloc.c | 2 +-
2 files changed, 4 insertions(+), 8 deletions(-)
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c 2008-03-03 15:51:50.832236606 -0800
+++ linux-2.6/mm/page_alloc.c 2008-03-03 15:52:35.036720645 -0800
@@ -623,7 +623,7 @@ static int prep_new_page(struct page *pa
if (PageReserved(page))
return 1;
- page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_readahead |
+ page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_reclaim |
1 << PG_referenced | 1 << PG_arch_1 |
1 << PG_owner_priv_1 | 1 << PG_mappedtodisk);
set_page_private(page, 0);
Index: linux-2.6/include/linux/page-flags.h
===================================================================
--- linux-2.6.orig/include/linux/page-flags.h 2008-03-03 15:52:34.212711617 -0800
+++ linux-2.6/include/linux/page-flags.h 2008-03-03 15:52:35.036720645 -0800
@@ -77,8 +77,6 @@ enum pageflags {
PG_active,
PG_slab,
PG_owner_priv_1, /* Owner use. If pagecache, fs may use*/
- PG_checked = PG_owner_priv_1, /* Used by some filesystems */
- PG_pinned = PG_owner_priv_1, /* Xen pinned pagetable */
PG_arch_1,
PG_reserved,
PG_private, /* If pagecache, has fs-private data */
@@ -87,8 +85,6 @@ enum pageflags {
PG_swapcache, /* Swap page: swp_entry_t in private */
PG_mappedtodisk, /* Has blocks allocated on-disk */
PG_reclaim, /* To be reclaimed asap */
- /* PG_readahead is only used for file reads; PG_reclaim is only for writes */
- PG_readahead = PG_reclaim, /* Reminder to do async read-ahead */
PG_buddy, /* Page is free, on buddy lists */
#if (BITS_PER_LONG > 32)
@@ -154,8 +150,8 @@ PAGEFLAG(Dirty, dirty) TESTSCFLAG(Dirty,
PAGEFLAG(LRU, lru) __CLEARPAGEFLAG(LRU, lru)
PAGEFLAG(Active, active) __CLEARPAGEFLAG(Active, active)
__PAGEFLAG(Slab, slab)
-PAGEFLAG(Checked, checked) /* Used by some filesystems */
-PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen pagetable */
+PAGEFLAG(Checked, owner_priv_1) /* Used by some filesystems */
+PAGEFLAG(Pinned, owner_priv_1) TESTSCFLAG(Pinned, owner_priv_1) /* Xen */
PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved)
PAGEFLAG(Private, private) __CLEARPAGEFLAG(Private, private)
__SETPAGEFLAG(Private, private)
@@ -170,7 +166,7 @@ PAGEFLAG(MappedToDisk, mappedtodisk)
/* PG_readahead is only used for file reads; PG_reclaim is only for writes */
PAGEFLAG(Reclaim, reclaim) TESTCLEARFLAG(Reclaim, reclaim)
-PAGEFLAG(Readahead, readahead) /* Reminder to do async read-ahead */
+PAGEFLAG(Readahead, reclaim) /* Reminder to do async read-ahead */
static inline int PageHighMem(struct page *page)
{
--
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Lameter <clameter@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, Mel Gorman <mel@csn.ul.ie>,
apw@shadowen.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Rik van Riel <riel@redhat.com>,
linux-mm@kvack.org
Subject: [rfc 05/10] Pageflags: Eliminate PG_xxx aliases
Date: Mon, 03 Mar 2008 16:04:57 -0800 [thread overview]
Message-ID: <20080304000733.255900083@sgi.com> (raw)
In-Reply-To: 20080304000452.514878384@sgi.com
[-- Attachment #1: pageflags-eliminate-aliases --]
[-- Type: text/plain, Size: 2965 bytes --]
Remove aliases of PG_xxx. We can easily drop those now and alias by specifying
the PG_xxx flag in the macro that generates the functions.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
include/linux/page-flags.h | 10 +++-------
mm/page_alloc.c | 2 +-
2 files changed, 4 insertions(+), 8 deletions(-)
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c 2008-03-03 15:51:50.832236606 -0800
+++ linux-2.6/mm/page_alloc.c 2008-03-03 15:52:35.036720645 -0800
@@ -623,7 +623,7 @@ static int prep_new_page(struct page *pa
if (PageReserved(page))
return 1;
- page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_readahead |
+ page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_reclaim |
1 << PG_referenced | 1 << PG_arch_1 |
1 << PG_owner_priv_1 | 1 << PG_mappedtodisk);
set_page_private(page, 0);
Index: linux-2.6/include/linux/page-flags.h
===================================================================
--- linux-2.6.orig/include/linux/page-flags.h 2008-03-03 15:52:34.212711617 -0800
+++ linux-2.6/include/linux/page-flags.h 2008-03-03 15:52:35.036720645 -0800
@@ -77,8 +77,6 @@ enum pageflags {
PG_active,
PG_slab,
PG_owner_priv_1, /* Owner use. If pagecache, fs may use*/
- PG_checked = PG_owner_priv_1, /* Used by some filesystems */
- PG_pinned = PG_owner_priv_1, /* Xen pinned pagetable */
PG_arch_1,
PG_reserved,
PG_private, /* If pagecache, has fs-private data */
@@ -87,8 +85,6 @@ enum pageflags {
PG_swapcache, /* Swap page: swp_entry_t in private */
PG_mappedtodisk, /* Has blocks allocated on-disk */
PG_reclaim, /* To be reclaimed asap */
- /* PG_readahead is only used for file reads; PG_reclaim is only for writes */
- PG_readahead = PG_reclaim, /* Reminder to do async read-ahead */
PG_buddy, /* Page is free, on buddy lists */
#if (BITS_PER_LONG > 32)
@@ -154,8 +150,8 @@ PAGEFLAG(Dirty, dirty) TESTSCFLAG(Dirty,
PAGEFLAG(LRU, lru) __CLEARPAGEFLAG(LRU, lru)
PAGEFLAG(Active, active) __CLEARPAGEFLAG(Active, active)
__PAGEFLAG(Slab, slab)
-PAGEFLAG(Checked, checked) /* Used by some filesystems */
-PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen pagetable */
+PAGEFLAG(Checked, owner_priv_1) /* Used by some filesystems */
+PAGEFLAG(Pinned, owner_priv_1) TESTSCFLAG(Pinned, owner_priv_1) /* Xen */
PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved)
PAGEFLAG(Private, private) __CLEARPAGEFLAG(Private, private)
__SETPAGEFLAG(Private, private)
@@ -170,7 +166,7 @@ PAGEFLAG(MappedToDisk, mappedtodisk)
/* PG_readahead is only used for file reads; PG_reclaim is only for writes */
PAGEFLAG(Reclaim, reclaim) TESTCLEARFLAG(Reclaim, reclaim)
-PAGEFLAG(Readahead, readahead) /* Reminder to do async read-ahead */
+PAGEFLAG(Readahead, reclaim) /* Reminder to do async read-ahead */
static inline int PageHighMem(struct page *page)
{
--
next prev parent reply other threads:[~2008-03-04 0:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-04 0:04 [rfc 00/10] [Patch] Page flags: Cleanup, reorg and introduce 5 new flags Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter
2008-03-04 0:04 ` [rfc 01/10] Pageflags: Use an enum for the flags Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter
2008-03-04 0:04 ` [rfc 02/10] Pageflags: Introduce macros to generate page flag functions Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter
2008-03-04 0:04 ` [rfc 03/10] Pageflags: Convert to the use of new macros Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter
2008-03-04 0:04 ` [rfc 04/10] Pageflags: Use proper page flag functions in Xen Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter [this message]
2008-03-04 0:04 ` [rfc 05/10] Pageflags: Eliminate PG_xxx aliases Christoph Lameter
2008-03-04 0:04 ` [rfc 06/10] Sparsemem: Vmemmap does not need section bits Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter
2008-03-04 0:04 ` [rfc 07/10] Kbuild: Create a way to create preprocessor constants from C expressions Christoph Lameter
2008-03-04 0:04 ` Christoph Lameter
2008-03-04 0:05 ` [rfc 08/10] Pageflags: Get rid of FLAGS_RESERVED Christoph Lameter
2008-03-04 0:05 ` Christoph Lameter
2008-03-04 0:05 ` [rfc 09/10] Get rid of __ZONE_COUNT Christoph Lameter
2008-03-04 0:05 ` Christoph Lameter
2008-03-04 0:05 ` [rfc 10/10] Pageflags: Land grab Christoph Lameter
2008-03-04 0:05 ` Christoph Lameter
2008-03-04 1:27 ` Andi Kleen
2008-03-04 5:38 ` Christoph Lameter
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