Johannes Weiner 31c0569c3b vmscan: drop page_mapping_inuse() ... page_mapping_inuse() is a historic predicate function for pages that are about to be reclaimed or deactivated. According to it, a page is in use when it is mapped into page tables OR part of swap cache OR backing an mmapped file. This function is used in combination with page_referenced(), which checks for young bits in ptes and the page descriptor itself for the PG_referenced bit. Thus, checking for unmapped swap cache pages is meaningless as PG_referenced is not set for anonymous pages and unmapped pages do not have young ptes. The test makes no difference. Protecting file pages that are not by themselves mapped but are part of a mapped file is also a historic leftover for short-lived things like the exec() code in libc. However, the VM now does reference accounting and activation of pages at unmap time and thus the special treatment on reclaim is obsolete. This patch drops page_mapping_inuse() and switches the two callsites to use page_mapped() directly. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: OSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-03-06 11:26:27 -08:00
..
Kconfig	Merge branch 'x86-bootmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-03 08:15:05 -08:00
Kconfig.debug	trivial: improve help text for mm debug config options	2009-09-21 15:14:57 +02:00
Makefile	make generic_acl slightly more generic	2009-12-16 12:16:49 -05:00
backing-dev.c	flusher: Fix PF_FROZEN race	2009-12-03 13:49:43 +01:00
bootmem.c	x86: Make 64 bit use early_res instead of bootmem before slab	2010-02-12 09:41:59 -08:00
bounce.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapools: protect page_list walk in show_pools()	2009-06-30 18:56:00 -07:00
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	failslab: add ability to filter slab caches	2010-02-26 19:19:39 +02:00
filemap.c	mm: use rlimit helpers	2010-03-06 11:26:24 -08:00
filemap_xip.c	mm: clean up mm_counter	2010-03-06 11:26:23 -08:00
fremap.c	mm: clean up mm_counter	2010-03-06 11:26:23 -08:00
highmem.c	highmem: Fix debug_kmap_atomic() to also handle KM_IRQ_PTE, KM_NMI, and KM_NMI_PTE	2009-11-10 04:15:47 +01:00
hugetlb.c	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2010-03-01 09:15:15 -08:00
hwpoison-inject.c	HWPOISON: Don't do early filtering if filter is disabled	2009-12-16 12:20:01 +01:00
init-mm.c	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
internal.h	HWPOISON: add an interface to switch off/on all the page filters	2009-12-16 12:19:59 +01:00
kmemcheck.c	kmemcheck: add hooks for the page allocator	2009-06-15 15:48:33 +02:00
kmemleak-test.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
kmemleak.c	Merge branch 'kmemleak' of git://linux-arm.org/linux-2.6	2009-12-17 16:00:19 -08:00
ksm.c	mm: change anon_vma linking to fix multi-process server scalability issue	2010-03-06 11:26:26 -08:00
maccess.c	maccess,probe_kernel: Allow arch specific override probe_kernel_(read|write)	2010-01-07 11:58:36 -06:00
madvise.c	HWPOISON: Add a madvise() injector for soft page offlining	2009-12-16 12:20:00 +01:00
memcontrol.c	mm/memcontrol.c: fix "integer as NULL pointer" sparse warning	2010-03-06 11:26:26 -08:00
memory-failure.c	mm: change anon_vma linking to fix multi-process server scalability issue	2010-03-06 11:26:26 -08:00
memory.c	rmap: move exclusively owned pages to own anon_vma in do_wp_page()	2010-03-06 11:26:26 -08:00
memory_hotplug.c	memory-hotplug: create /sys/firmware/memmap entry for new memory	2010-03-06 11:26:25 -08:00
mempolicy.c	mm/mempolicy.c: fix indentation of the comments of do_migrate_pages	2010-03-06 11:26:25 -08:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	mm/migrate.c: kill anon local variable from migrate_page_copy	2010-03-06 11:26:25 -08:00
mincore.c	mm: hugetlb: fix hugepage memory leak in mincore()	2009-12-15 08:53:24 -08:00
mlock.c	mm: use rlimit helpers	2010-03-06 11:26:24 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	mm: remove VM_LOCK_RMAP code	2010-03-06 11:26:26 -08:00
mmu_context.c	mm: export use_mm/unuse_mm to modules	2010-01-15 01:43:28 -08:00
mmu_notifier.c	ksm: add mmu_notifier set_pte_at_notify()	2009-09-22 07:17:31 -07:00
mmzone.c	[ARM] Double check memmap is actually valid with a memmap has unexpected holes V2	2009-05-18 11:22:24 +01:00
mprotect.c	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
mremap.c	mm: change anon_vma linking to fix multi-process server scalability issue	2010-03-06 11:26:26 -08:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	mm: change anon_vma linking to fix multi-process server scalability issue	2010-03-06 11:26:26 -08:00
oom_kill.c	mm: clean up mm_counter	2010-03-06 11:26:23 -08:00
page-writeback.c	writeback: remove unused nonblocking and congestion checks	2009-12-03 13:54:25 +01:00
page_alloc.c	mm: suppress pfn range output for zones without pages	2010-03-06 11:26:26 -08:00
page_cgroup.c	memory hotplug: alloc page from other node in memory online	2009-09-22 07:17:26 -07:00
page_io.c	swap: rework map_swap_page() again	2009-12-15 08:53:16 -08:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
pagewalk.c	mm hugetlb: add hugepage support to pagemap	2009-12-15 08:53:24 -08:00
percpu.c	early_res: Add free_early_partial()	2010-02-26 08:25:35 +01:00
prio_tree.c	…
quicklist.c	cpumask: use new-style cpumask ops in mm/quicklist.	2009-09-24 09:34:52 +09:30
readahead.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
rmap.c	mm: remove VM_LOCK_RMAP code	2010-03-06 11:26:26 -08:00
shmem.c	Fix breakage in shmem.c	2009-12-16 19:48:48 -05:00
slab.c	Merge branches 'slab/cleanups', 'slab/failslab', 'slab/fixes' and 'slub/percpu' into slab-for-linus	2010-03-04 12:07:50 +02:00
slob.c	slab: remove duplicate kmem_cache_init_late() declarations	2009-08-06 11:36:25 +03:00
slub.c	SLUB: Fix per-cpu merge conflict	2010-03-04 12:09:43 +02:00
sparse-vmemmap.c	sparsemem: Put mem map for one node together.	2010-02-12 09:42:38 -08:00
sparse.c	sparsemem: Fix compilation on PowerPC	2010-03-01 17:59:24 -08:00
swap.c	mm: remove free_hot_page()	2010-03-06 11:26:25 -08:00
swap_state.c	mm: add_to_swap_cache() does not return -EEXIST	2009-09-22 07:17:35 -07:00
swapfile.c	mm/swapfile.c: fix swapon size off-by-one	2010-03-06 11:26:26 -08:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	vfs: Fix vmtruncate() regression	2010-01-13 16:09:33 -08:00
util.c	nommu: don't need get_unmapped_area() for NOMMU	2010-01-16 12:15:40 -08:00
vmalloc.c	mm: purge fragmented percpu vmap blocks	2010-02-02 12:50:47 -08:00
vmscan.c	vmscan: drop page_mapping_inuse()	2010-03-06 11:26:27 -08:00
vmstat.c	mm: restore zone->all_unreclaimable to independence word	2010-03-06 11:26:25 -08:00