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bitkeeper revision 1.1159.170.37 (419b4e93x5uYHCJBfuNflDeySU4JpQ)

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Clean up "foreign pages" patch to refelect what we pushed upstream to
the core Linux maintainers.
This commit is contained in:
kaf24@freefall.cl.cam.ac.uk committed 2004-11-17 13:13:55 +00:00
1 parent 3d95c17302
commit 79085091e6
10 files changed
+193 -352
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.rootkeys
+2 -1
View File
@@ -237,6 +237,7 @@
40f5623bxUbeGjkRrjDguCy_Gm8RLw linux-2.6.9-xen-sparse/include/asm-xen/asm-i386/xor.h
40f5623bYNP7tHE2zX6YQxp9Zq2utQ linux-2.6.9-xen-sparse/include/asm-xen/ctrl_if.h
40f5623b3Eqs8pAc5WpPX8_jTzV2qw linux-2.6.9-xen-sparse/include/asm-xen/evtchn.h
419b4e9367PjTEvdjwavWN12BeBBXg linux-2.6.9-xen-sparse/include/asm-xen/foreign_page.h
412dfaeazclyNDM0cpnp60Yo4xulpQ linux-2.6.9-xen-sparse/include/asm-xen/gnttab.h
40f5623aGPlsm0u1LTO-NVZ6AGzNRQ linux-2.6.9-xen-sparse/include/asm-xen/hypervisor.h
3f108af1ylCIm82H052FVTfXACBHrw linux-2.6.9-xen-sparse/include/asm-xen/linux-public/privcmd.h
@@ -245,7 +246,7 @@
4122466356eIBnC9ot44WSVVIFyhQA linux-2.6.9-xen-sparse/include/asm-xen/queues.h
3f689063BoW-HWV3auUJ-OqXfcGArw linux-2.6.9-xen-sparse/include/asm-xen/xen_proc.h
4124d8c4aocX7A-jIbuGraWN84pxGQ linux-2.6.9-xen-sparse/include/linux/bio.h
4124f66fp5QwbDHEfoUIa7pqO5Xhag linux-2.6.9-xen-sparse/include/linux/page-flags.h
419b4e93z2S0gR17XTy8wg09JEwAhg linux-2.6.9-xen-sparse/include/linux/gfp.h
4124f66f4NaKNa0xPiGGykn9QaZk3w linux-2.6.9-xen-sparse/include/linux/skbuff.h
40f56a0ddHCSs3501MY4hRf22tctOw linux-2.6.9-xen-sparse/mkbuildtree
412f46c0LJuKAgSPGoC0Z1DEkLfuLA linux-2.6.9-xen-sparse/mm/memory.c
linux-2.6.9-xen-sparse/arch/xen/Kconfig
-4
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@@ -111,10 +111,6 @@ config XEN_SCRUB_PAGES
endmenu
config FOREIGN_PAGES
bool
default y
config HAVE_ARCH_DEV_ALLOC_SKB
bool
default y
linux-2.6.9-xen-sparse/arch/xen/configs/xen0_defconfig
+1 -2
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@@ -19,7 +19,6 @@ CONFIG_XEN_NETDEV_FRONTEND=y
# CONFIG_XEN_NETDEV_FRONTEND_PIPELINED_TRANSMITTER is not set
CONFIG_XEN_WRITABLE_PAGETABLES=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_FOREIGN_PAGES=y
CONFIG_HAVE_ARCH_DEV_ALLOC_SKB=y
CONFIG_X86=y
# CONFIG_X86_64 is not set
@@ -158,7 +157,7 @@ CONFIG_MAGIC_SYSRQ=y
# CONFIG_DEBUG_INFO is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_FRAME_POINTER is not set
CONFIG_4KSTACKS=y
# CONFIG_4KSTACKS is not set
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_STD_RESOURCES=y
CONFIG_PC=y
linux-2.6.9-xen-sparse/arch/xen/configs/xenU_defconfig
+1 -2
View File
@@ -19,7 +19,6 @@ CONFIG_XEN_NETDEV_FRONTEND=y
# CONFIG_XEN_NETDEV_FRONTEND_PIPELINED_TRANSMITTER is not set
CONFIG_XEN_WRITABLE_PAGETABLES=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_FOREIGN_PAGES=y
CONFIG_HAVE_ARCH_DEV_ALLOC_SKB=y
CONFIG_X86=y
# CONFIG_X86_64 is not set
@@ -119,7 +118,7 @@ CONFIG_HAVE_DEC_LOCK=y
CONFIG_EARLY_PRINTK=y
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_FRAME_POINTER is not set
CONFIG_4KSTACKS=y
# CONFIG_4KSTACKS is not set
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_STD_RESOURCES=y
CONFIG_PC=y
linux-2.6.9-xen-sparse/arch/xen/i386/mm/pgtable.c
+2
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@@ -23,6 +23,8 @@
#include <asm/tlbflush.h>
#include <asm/io.h>
#include <asm-xen/foreign_page.h>
void show_mem(void)
{
int total = 0, reserved = 0;
linux-2.6.9-xen-sparse/include/asm-xen/asm-i386/page.h
+9
View File
@@ -16,6 +16,15 @@
#include <linux/string.h>
#include <linux/types.h>
#include <asm-xen/xen-public/xen.h>
#include <asm-xen/foreign_page.h>
#define arch_free_page(_page,_order) \
({ int foreign = PageForeign(_page); \
if (foreign) \
(PageForeignDestructor(_page))(_page); \
foreign; \
})
#define HAVE_ARCH_FREE_PAGE
#ifdef CONFIG_XEN_SCRUB_PAGES
#define scrub_pages(_p,_n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
linux-2.6.9-xen-sparse/include/asm-xen/foreign_page.h
+33
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@@ -0,0 +1,33 @@
/******************************************************************************
* foreign_page.h
*
* Provide a "foreign" page type, that is owned by a foreign allocator and
* not the normal buddy allocator in page_alloc.c
*
* Copyright (c) 2004, K A Fraser
*/
#ifndef __ASM_XEN_FOREIGN_PAGE_H__
#define __ASM_XEN_FOREIGN_PAGE_H__
/*
* NOTE: PG_foreign must not conflict with any PG_ definition in page-flags.h!!
*/
#define PG_foreign 25
#define PageForeign(page) test_bit(PG_foreign, &(page)->flags)
#define SetPageForeign(page, dtor) do { \
set_bit(PG_foreign, &(page)->flags); \
(page)->mapping = (void *)dtor; \
} while (0)
#define ClearPageForeign(page) do { \
clear_bit(PG_foreign, &(page)->flags); \
(page)->mapping = NULL; \
} while (0)
#define PageForeignDestructor(page) \
( (void (*) (struct page *)) (page)->mapping )
#endif /* __ASM_XEN_FOREIGN_PAGE_H__ */
linux-2.6.9-xen-sparse/include/linux/gfp.h
+141
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@@ -0,0 +1,141 @@
#ifndef __LINUX_GFP_H
#define __LINUX_GFP_H
#include <linux/mmzone.h>
#include <linux/stddef.h>
#include <linux/linkage.h>
#include <linux/config.h>
struct vm_area_struct;
/*
* GFP bitmasks..
*/
/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low two bits) */
#define __GFP_DMA 0x01
#define __GFP_HIGHMEM 0x02
/*
* Action modifiers - doesn't change the zoning
*
* __GFP_REPEAT: Try hard to allocate the memory, but the allocation attempt
* _might_ fail. This depends upon the particular VM implementation.
*
* __GFP_NOFAIL: The VM implementation _must_ retry infinitely: the caller
* cannot handle allocation failures.
*
* __GFP_NORETRY: The VM implementation must not retry indefinitely.
*/
#define __GFP_WAIT 0x10 /* Can wait and reschedule? */
#define __GFP_HIGH 0x20 /* Should access emergency pools? */
#define __GFP_IO 0x40 /* Can start physical IO? */
#define __GFP_FS 0x80 /* Can call down to low-level FS? */
#define __GFP_COLD 0x100 /* Cache-cold page required */
#define __GFP_NOWARN 0x200 /* Suppress page allocation failure warning */
#define __GFP_REPEAT 0x400 /* Retry the allocation. Might fail */
#define __GFP_NOFAIL 0x800 /* Retry for ever. Cannot fail */
#define __GFP_NORETRY 0x1000 /* Do not retry. Might fail */
#define __GFP_NO_GROW 0x2000 /* Slab internal usage */
#define __GFP_COMP 0x4000 /* Add compound page metadata */
#define __GFP_BITS_SHIFT 16 /* Room for 16 __GFP_FOO bits */
#define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1)
/* if you forget to add the bitmask here kernel will crash, period */
#define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS| \
__GFP_COLD|__GFP_NOWARN|__GFP_REPEAT| \
__GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP)
#define GFP_ATOMIC (__GFP_HIGH)
#define GFP_NOIO (__GFP_WAIT)
#define GFP_NOFS (__GFP_WAIT | __GFP_IO)
#define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS)
#define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS)
#define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HIGHMEM)
/* Flag - indicates that the buffer will be suitable for DMA. Ignored on some
platforms, used as appropriate on others */
#define GFP_DMA __GFP_DMA
/*
* There is only one page-allocator function, and two main namespaces to
* it. The alloc_page*() variants return 'struct page *' and as such
* can allocate highmem pages, the *get*page*() variants return
* virtual kernel addresses to the allocated page(s).
*/
/*
* We get the zone list from the current node and the gfp_mask.
* This zone list contains a maximum of MAXNODES*MAX_NR_ZONES zones.
*
* For the normal case of non-DISCONTIGMEM systems the NODE_DATA() gets
* optimized to &contig_page_data at compile-time.
*/
/*
* If arch_free_page returns non-zero then the generic free_page code can
* immediately bail: the arch-specific function has done all the work.
*/
#ifndef HAVE_ARCH_FREE_PAGE
static inline int arch_free_page(struct page *page, int order)
{
/* Generic free_page must do the work. */
return 0;
}
#endif
extern struct page *
FASTCALL(__alloc_pages(unsigned int, unsigned int, struct zonelist *));
static inline struct page *alloc_pages_node(int nid, unsigned int gfp_mask,
unsigned int order)
{
if (unlikely(order >= MAX_ORDER))
return NULL;
return __alloc_pages(gfp_mask, order,
NODE_DATA(nid)->node_zonelists + (gfp_mask & GFP_ZONEMASK));
}
#ifdef CONFIG_NUMA
extern struct page *alloc_pages_current(unsigned gfp_mask, unsigned order);
static inline struct page *
alloc_pages(unsigned int gfp_mask, unsigned int order)
{
if (unlikely(order >= MAX_ORDER))
return NULL;
return alloc_pages_current(gfp_mask, order);
}
extern struct page *alloc_page_vma(unsigned gfp_mask,
struct vm_area_struct *vma, unsigned long addr);
#else
#define alloc_pages(gfp_mask, order) \
alloc_pages_node(numa_node_id(), gfp_mask, order)
#define alloc_page_vma(gfp_mask, vma, addr) alloc_pages(gfp_mask, 0)
#endif
#define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0)
extern unsigned long FASTCALL(__get_free_pages(unsigned int gfp_mask, unsigned int order));
extern unsigned long FASTCALL(get_zeroed_page(unsigned int gfp_mask));
#define __get_free_page(gfp_mask) \
__get_free_pages((gfp_mask),0)
#define __get_dma_pages(gfp_mask, order) \
__get_free_pages((gfp_mask) | GFP_DMA,(order))
extern void FASTCALL(__free_pages(struct page *page, unsigned int order));
extern void FASTCALL(free_pages(unsigned long addr, unsigned int order));
extern void FASTCALL(free_hot_page(struct page *page));
extern void FASTCALL(free_cold_page(struct page *page));
#define __free_page(page) __free_pages((page), 0)
#define free_page(addr) free_pages((addr),0)
void page_alloc_init(void);
#endif /* __LINUX_GFP_H */
linux-2.6.9-xen-sparse/include/linux/page-flags.h
-338
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@@ -1,338 +0,0 @@
/*
* Macros for manipulating and testing page->flags
*/
#ifndef PAGE_FLAGS_H
#define PAGE_FLAGS_H
#include <linux/percpu.h>
#include <linux/cache.h>
#include <asm/pgtable.h>
/*
* Various page->flags bits:
*
* PG_reserved is set for special pages, which can never be swapped out. Some
* of them might not even exist (eg empty_bad_page)...
*
* The PG_private bitflag is set if page->private contains a valid value.
*
* During disk I/O, PG_locked is used. This bit is set before I/O and
* reset when I/O completes. page_waitqueue(page) is a wait queue of all tasks
* waiting for the I/O on this page to complete.
*
* PG_uptodate tells whether the page's contents is valid. When a read
* completes, the page becomes uptodate, unless a disk I/O error happened.
*
* For choosing which pages to swap out, inode pages carry a PG_referenced bit,
* which is set any time the system accesses that page through the (mapping,
* index) hash table. This referenced bit, together with the referenced bit
* in the page tables, is used to manipulate page->age and move the page across
* the active, inactive_dirty and inactive_clean lists.
*
* Note that the referenced bit, the page->lru list_head and the active,
* inactive_dirty and inactive_clean lists are protected by the
* zone->lru_lock, and *NOT* by the usual PG_locked bit!
*
* PG_error is set to indicate that an I/O error occurred on this page.
*
* PG_arch_1 is an architecture specific page state bit. The generic code
* guarantees that this bit is cleared for a page when it first is entered into
* the page cache.
*
* PG_highmem pages are not permanently mapped into the kernel virtual address
* space, they need to be kmapped separately for doing IO on the pages. The
* struct page (these bits with information) are always mapped into kernel
* address space...
*/
/*
* Don't use the *_dontuse flags. Use the macros. Otherwise you'll break
* locked- and dirty-page accounting. The top eight bits of page->flags are
* used for page->zone, so putting flag bits there doesn't work.
*/
#define PG_locked 0 /* Page is locked. Don't touch. */
#define PG_error 1
#define PG_referenced 2
#define PG_uptodate 3
#define PG_dirty 4
#define PG_lru 5
#define PG_active 6
#define PG_slab 7 /* slab debug (Suparna wants this) */
#define PG_highmem 8
#define PG_checked 9 /* kill me in 2.5.<early>. */
#define PG_arch_1 10
#define PG_reserved 11
#define PG_private 12 /* Has something at ->private */
#define PG_writeback 13 /* Page is under writeback */
#define PG_nosave 14 /* Used for system suspend/resume */
#define PG_compound 15 /* Part of a compound page */
#define PG_swapcache 16 /* Swap page: swp_entry_t in private */
#define PG_mappedtodisk 17 /* Has blocks allocated on-disk */
#define PG_reclaim 18 /* To be reclaimed asap */
#define PG_foreign 21 /* Page belongs to foreign allocator */
/*
* Global page accounting. One instance per CPU. Only unsigned longs are
* allowed.
*/
struct page_state {
unsigned long nr_dirty; /* Dirty writeable pages */
unsigned long nr_writeback; /* Pages under writeback */
unsigned long nr_unstable; /* NFS unstable pages */
unsigned long nr_page_table_pages;/* Pages used for pagetables */
unsigned long nr_mapped; /* mapped into pagetables */
unsigned long nr_slab; /* In slab */
#define GET_PAGE_STATE_LAST nr_slab
/*
* The below are zeroed by get_page_state(). Use get_full_page_state()
* to add up all these.
*/
unsigned long pgpgin; /* Disk reads */
unsigned long pgpgout; /* Disk writes */
unsigned long pswpin; /* swap reads */
unsigned long pswpout; /* swap writes */
unsigned long pgalloc_high; /* page allocations */
unsigned long pgalloc_normal;
unsigned long pgalloc_dma;
unsigned long pgfree; /* page freeings */
unsigned long pgactivate; /* pages moved inactive->active */
unsigned long pgdeactivate; /* pages moved active->inactive */
unsigned long pgfault; /* faults (major+minor) */
unsigned long pgmajfault; /* faults (major only) */
unsigned long pgrefill_high; /* inspected in refill_inactive_zone */
unsigned long pgrefill_normal;
unsigned long pgrefill_dma;
unsigned long pgsteal_high; /* total highmem pages reclaimed */
unsigned long pgsteal_normal;
unsigned long pgsteal_dma;
unsigned long pgscan_kswapd_high;/* total highmem pages scanned */
unsigned long pgscan_kswapd_normal;
unsigned long pgscan_kswapd_dma;
unsigned long pgscan_direct_high;/* total highmem pages scanned */
unsigned long pgscan_direct_normal;
unsigned long pgscan_direct_dma;
unsigned long pginodesteal; /* pages reclaimed via inode freeing */
unsigned long slabs_scanned; /* slab objects scanned */
unsigned long kswapd_steal; /* pages reclaimed by kswapd */
unsigned long kswapd_inodesteal;/* reclaimed via kswapd inode freeing */
unsigned long pageoutrun; /* kswapd's calls to page reclaim */
unsigned long allocstall; /* direct reclaim calls */
unsigned long pgrotated; /* pages rotated to tail of the LRU */
};
DECLARE_PER_CPU(struct page_state, page_states);
extern void get_page_state(struct page_state *ret);
extern void get_full_page_state(struct page_state *ret);
extern unsigned long __read_page_state(unsigned offset);
#define read_page_state(member) \
__read_page_state(offsetof(struct page_state, member))
#define mod_page_state(member, delta) \
do { \
unsigned long flags; \
local_irq_save(flags); \
__get_cpu_var(page_states).member += (delta); \
local_irq_restore(flags); \
} while (0)
#define inc_page_state(member) mod_page_state(member, 1UL)
#define dec_page_state(member) mod_page_state(member, 0UL - 1)
#define add_page_state(member,delta) mod_page_state(member, (delta))
#define sub_page_state(member,delta) mod_page_state(member, 0UL - (delta))
#define mod_page_state_zone(zone, member, delta) \
do { \
unsigned long flags; \
local_irq_save(flags); \
if (is_highmem(zone)) \
__get_cpu_var(page_states).member##_high += (delta);\
else if (is_normal(zone)) \
__get_cpu_var(page_states).member##_normal += (delta);\
else \
__get_cpu_var(page_states).member##_dma += (delta);\
local_irq_restore(flags); \
} while (0)
/*
* Manipulation of page state flags
*/
#define PageLocked(page) \
test_bit(PG_locked, &(page)->flags)
#define SetPageLocked(page) \
set_bit(PG_locked, &(page)->flags)
#define TestSetPageLocked(page) \
test_and_set_bit(PG_locked, &(page)->flags)
#define ClearPageLocked(page) \
clear_bit(PG_locked, &(page)->flags)
#define TestClearPageLocked(page) \
test_and_clear_bit(PG_locked, &(page)->flags)
#define PageError(page) test_bit(PG_error, &(page)->flags)
#define SetPageError(page) set_bit(PG_error, &(page)->flags)
#define ClearPageError(page) clear_bit(PG_error, &(page)->flags)
#define PageReferenced(page) test_bit(PG_referenced, &(page)->flags)
#define SetPageReferenced(page) set_bit(PG_referenced, &(page)->flags)
#define ClearPageReferenced(page) clear_bit(PG_referenced, &(page)->flags)
#define TestClearPageReferenced(page) test_and_clear_bit(PG_referenced, &(page)->flags)
#define PageUptodate(page) test_bit(PG_uptodate, &(page)->flags)
#ifndef SetPageUptodate
#define SetPageUptodate(page) set_bit(PG_uptodate, &(page)->flags)
#endif
#define ClearPageUptodate(page) clear_bit(PG_uptodate, &(page)->flags)
#define PageDirty(page) test_bit(PG_dirty, &(page)->flags)
#define SetPageDirty(page) set_bit(PG_dirty, &(page)->flags)
#define TestSetPageDirty(page) test_and_set_bit(PG_dirty, &(page)->flags)
#define ClearPageDirty(page) clear_bit(PG_dirty, &(page)->flags)
#define TestClearPageDirty(page) test_and_clear_bit(PG_dirty, &(page)->flags)
#define SetPageLRU(page) set_bit(PG_lru, &(page)->flags)
#define PageLRU(page) test_bit(PG_lru, &(page)->flags)
#define TestSetPageLRU(page) test_and_set_bit(PG_lru, &(page)->flags)
#define TestClearPageLRU(page) test_and_clear_bit(PG_lru, &(page)->flags)
#define PageActive(page) test_bit(PG_active, &(page)->flags)
#define SetPageActive(page) set_bit(PG_active, &(page)->flags)
#define ClearPageActive(page) clear_bit(PG_active, &(page)->flags)
#define TestClearPageActive(page) test_and_clear_bit(PG_active, &(page)->flags)
#define TestSetPageActive(page) test_and_set_bit(PG_active, &(page)->flags)
#define PageSlab(page) test_bit(PG_slab, &(page)->flags)
#define SetPageSlab(page) set_bit(PG_slab, &(page)->flags)
#define ClearPageSlab(page) clear_bit(PG_slab, &(page)->flags)
#define TestClearPageSlab(page) test_and_clear_bit(PG_slab, &(page)->flags)
#define TestSetPageSlab(page) test_and_set_bit(PG_slab, &(page)->flags)
#ifdef CONFIG_HIGHMEM
#define PageHighMem(page) test_bit(PG_highmem, &(page)->flags)
#else
#define PageHighMem(page) 0 /* needed to optimize away at compile time */
#endif
#define PageChecked(page) test_bit(PG_checked, &(page)->flags)
#define SetPageChecked(page) set_bit(PG_checked, &(page)->flags)
#define ClearPageChecked(page) clear_bit(PG_checked, &(page)->flags)
#define PageReserved(page) test_bit(PG_reserved, &(page)->flags)
#define SetPageReserved(page) set_bit(PG_reserved, &(page)->flags)
#define ClearPageReserved(page) clear_bit(PG_reserved, &(page)->flags)
#define __ClearPageReserved(page) __clear_bit(PG_reserved, &(page)->flags)
#define SetPagePrivate(page) set_bit(PG_private, &(page)->flags)
#define ClearPagePrivate(page) clear_bit(PG_private, &(page)->flags)
#define PagePrivate(page) test_bit(PG_private, &(page)->flags)
#define PageWriteback(page) test_bit(PG_writeback, &(page)->flags)
#define SetPageWriteback(page) \
do { \
if (!test_and_set_bit(PG_writeback, \
&(page)->flags)) \
inc_page_state(nr_writeback); \
} while (0)
#define TestSetPageWriteback(page) \
({ \
int ret; \
ret = test_and_set_bit(PG_writeback, \
&(page)->flags); \
if (!ret) \
inc_page_state(nr_writeback); \
ret; \
})
#define ClearPageWriteback(page) \
do { \
if (test_and_clear_bit(PG_writeback, \
&(page)->flags)) \
dec_page_state(nr_writeback); \
} while (0)
#define TestClearPageWriteback(page) \
({ \
int ret; \
ret = test_and_clear_bit(PG_writeback, \
&(page)->flags); \
if (ret) \
dec_page_state(nr_writeback); \
ret; \
})
#define PageNosave(page) test_bit(PG_nosave, &(page)->flags)
#define SetPageNosave(page) set_bit(PG_nosave, &(page)->flags)
#define TestSetPageNosave(page) test_and_set_bit(PG_nosave, &(page)->flags)
#define ClearPageNosave(page) clear_bit(PG_nosave, &(page)->flags)
#define TestClearPageNosave(page) test_and_clear_bit(PG_nosave, &(page)->flags)
#define PageMappedToDisk(page) test_bit(PG_mappedtodisk, &(page)->flags)
#define SetPageMappedToDisk(page) set_bit(PG_mappedtodisk, &(page)->flags)
#define ClearPageMappedToDisk(page) clear_bit(PG_mappedtodisk, &(page)->flags)
#define PageReclaim(page) test_bit(PG_reclaim, &(page)->flags)
#define SetPageReclaim(page) set_bit(PG_reclaim, &(page)->flags)
#define ClearPageReclaim(page) clear_bit(PG_reclaim, &(page)->flags)
#define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags)
#define PageCompound(page) test_bit(PG_compound, &(page)->flags)
#define SetPageCompound(page) set_bit(PG_compound, &(page)->flags)
#define ClearPageCompound(page) clear_bit(PG_compound, &(page)->flags)
/* A foreign page uses a custom destructor rather than the buddy allocator. */
#ifdef CONFIG_FOREIGN_PAGES
#define PageForeign(page) test_bit(PG_foreign, &(page)->flags)
#define SetPageForeign(page, dtor) do { \
set_bit(PG_foreign, &(page)->flags); \
(page)->mapping = (void *)dtor; \
} while (0)
#define ClearPageForeign(page) do { \
clear_bit(PG_foreign, &(page)->flags); \
(page)->mapping = NULL; \
} while (0)
#define PageForeignDestructor(page) \
( (void (*) (struct page *)) (page)->mapping )
#else
#define PageForeign(page) 0
#define PageForeignDestructor(page) void
#endif
#ifdef CONFIG_SWAP
#define PageSwapCache(page) test_bit(PG_swapcache, &(page)->flags)
#define SetPageSwapCache(page) set_bit(PG_swapcache, &(page)->flags)
#define ClearPageSwapCache(page) clear_bit(PG_swapcache, &(page)->flags)
#else
#define PageSwapCache(page) 0
#endif
struct page; /* forward declaration */
int test_clear_page_dirty(struct page *page);
int __clear_page_dirty(struct page *page);
int test_clear_page_writeback(struct page *page);
int test_set_page_writeback(struct page *page);
static inline void clear_page_dirty(struct page *page)
{
test_clear_page_dirty(page);
}
static inline void set_page_writeback(struct page *page)
{
test_set_page_writeback(page);
}
#endif /* PAGE_FLAGS_H */
linux-2.6.9-xen-sparse/mm/page_alloc.c
+4 -5
View File
@@ -275,7 +275,8 @@ void __free_pages_ok(struct page *page, unsigned int order)
LIST_HEAD(list);
int i;
arch_free_page(page, order);
if (arch_free_page(page, order))
return;
mod_page_state(pgfree, 1 << order);
for (i = 0 ; i < (1 << order) ; ++i)
@@ -505,10 +506,8 @@ static void fastcall free_hot_cold_page(struct page *page, int cold)
struct per_cpu_pages *pcp;
unsigned long flags;
if (PageForeign(page))
return (PageForeignDestructor(page))(page);
arch_free_page(page, 0);
if (arch_free_page(page, 0))
return;
kernel_map_pages(page, 1, 0);
inc_page_state(pgfree);
Reference in new issue
xen-project/xen
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