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* agp_gart(): Use vm_page_[un]reserve_pages().

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* Removed unused vm_page_allocate_pages().
* Removed now unused (always true) "reserved" parameter from
  vm_page_allocate_page().
* Removed unused (always false) "stealActive" parameter from steal_page().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34836 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2010-01-01 16:37:14 +00:00
parent e30dd2c076
commit 1021fd2826
8 changed files with 45 additions and 124 deletions
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4
headers/private/kernel/vm/vm_page.h
View File

@ -49,9 +49,7 @@ void vm_page_unreserve_pages(uint32 count);
void vm_page_reserve_pages(uint32 count);
bool vm_page_try_reserve_pages(uint32 count);
struct vm_page *vm_page_allocate_page(int pageState, bool reserved);
status_t vm_page_allocate_pages(int pageState, struct vm_page **pages,
uint32 numPages);
struct vm_page *vm_page_allocate_page(int pageState);
struct vm_page *vm_page_allocate_page_run(int state, addr_t base,
addr_t length);
struct vm_page *vm_page_allocate_page_run_no_base(int state, addr_t count);

16
src/add-ons/kernel/bus_managers/agp_gart/agp_gart.cpp
View File

@ -545,18 +545,10 @@ Aperture::AllocateMemory(aperture_memory *memory, uint32 flags)
if (memory->pages == NULL)
return B_NO_MEMORY;
for (uint32 i = 0; i < count; i++) {
memory->pages[i] = vm_page_allocate_page(PAGE_STATE_CLEAR, false);
if (memory->pages[i] == NULL) {
// Free pages we already allocated
while (i-- > 0) {
vm_page_set_state(memory->pages[i], PAGE_STATE_CLEAR);
}
free(memory->pages);
memory->pages = NULL;
return B_NO_MEMORY;
}
}
vm_page_reserve_pages(count);
for (uint32 i = 0; i < count; i++)
memory->pages[i] = vm_page_allocate_page(PAGE_STATE_CLEAR);
vm_page_unreserve_pages(count);
}
#else
void *address;

4
src/system/kernel/arch/m68k/arch_vm_translation_map_impl.cpp
View File

@ -540,7 +540,7 @@ map_tmap(vm_translation_map *map, addr_t va, addr_t pa, uint32 attributes)
unsigned int i;
// we need to allocate a pgtable
page = vm_page_allocate_page(PAGE_STATE_CLEAR, true);
page = vm_page_allocate_page(PAGE_STATE_CLEAR);
// mark the page WIRED
vm_page_set_state(page, PAGE_STATE_WIRED);
@ -586,7 +586,7 @@ map_tmap(vm_translation_map *map, addr_t va, addr_t pa, uint32 attributes)
unsigned int i;
// we need to allocate a pgtable
page = vm_page_allocate_page(PAGE_STATE_CLEAR, true);
page = vm_page_allocate_page(PAGE_STATE_CLEAR);
// mark the page WIRED
vm_page_set_state(page, PAGE_STATE_WIRED);

4
src/system/kernel/arch/x86/arch_vm_translation_map.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright 2008, Ingo Weinhold, ingo_weinhold@gmx.de.
* Copyright 2008-2009, Ingo Weinhold, ingo_weinhold@gmx.de.
* Copyright 2002-2007, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
* Distributed under the terms of the MIT License.
*
@ -364,7 +364,7 @@ map_tmap(vm_translation_map *map, addr_t va, addr_t pa, uint32 attributes)
vm_page *page;
// we need to allocate a pgtable
page = vm_page_allocate_page(PAGE_STATE_CLEAR, true);
page = vm_page_allocate_page(PAGE_STATE_CLEAR);
// mark the page WIRED
vm_page_set_state(page, PAGE_STATE_WIRED);

6
src/system/kernel/cache/file_cache.cpp vendored
View File

@ -149,7 +149,7 @@ PrecacheIO::Prepare()
// allocate pages for the cache and mark them busy
uint32 i = 0;
for (size_t pos = 0; pos < fSize; pos += B_PAGE_SIZE) {
vm_page* page = vm_page_allocate_page(PAGE_STATE_FREE, true);
vm_page* page = vm_page_allocate_page(PAGE_STATE_FREE);
if (page == NULL)
break;
@ -381,7 +381,7 @@ read_into_cache(file_cache_ref* ref, void* cookie, off_t offset,
// allocate pages for the cache and mark them busy
for (size_t pos = 0; pos < numBytes; pos += B_PAGE_SIZE) {
vm_page* page = pages[pageIndex++] = vm_page_allocate_page(
PAGE_STATE_FREE, true);
PAGE_STATE_FREE);
if (page == NULL)
panic("no more pages!");
@ -506,7 +506,7 @@ write_to_cache(file_cache_ref* ref, void* cookie, off_t offset,
// TODO: the pages we allocate here should have been reserved upfront
// in cache_io()
vm_page* page = pages[pageIndex++] = vm_page_allocate_page(
PAGE_STATE_FREE, true);
PAGE_STATE_FREE);
ref->cache->InsertPage(page, offset + pos);

3
src/system/kernel/vm/VMCache.cpp
View File

@ -515,9 +515,6 @@ vm_cache_acquire_locked_page_cache(vm_page* page, bool dontWait)
return NULL;
}
// TODO: this is problematic, as it requires the caller not to have
// a lock on this cache (it might be called via
// vm_page_allocate_page(..., false)).
if (!cache->SwitchLock(&sCacheListLock)) {
// cache has been deleted
mutex_lock(&sCacheListLock);

8
src/system/kernel/vm/vm.cpp
View File

@ -871,7 +871,7 @@ vm_create_anonymous_area(team_id team, const char* name, void** address,
# endif
continue;
#endif
vm_page* page = vm_page_allocate_page(newPageState, true);
vm_page* page = vm_page_allocate_page(newPageState);
cache->InsertPage(page, offset);
vm_map_page(area, page, address, protection);
@ -3671,7 +3671,7 @@ fault_get_page(PageFaultContext& context)
// see if the backing store has it
if (cache->HasPage(context.cacheOffset)) {
// insert a fresh page and mark it busy -- we're going to read it in
page = vm_page_allocate_page(PAGE_STATE_FREE, true);
page = vm_page_allocate_page(PAGE_STATE_FREE);
cache->InsertPage(page, context.cacheOffset);
// We need to unlock all caches and the address space while reading
@ -3724,7 +3724,7 @@ fault_get_page(PageFaultContext& context)
cache = context.isWrite ? context.topCache : lastCache;
// allocate a clean page
page = vm_page_allocate_page(PAGE_STATE_CLEAR, true);
page = vm_page_allocate_page(PAGE_STATE_CLEAR);
FTRACE(("vm_soft_fault: just allocated page 0x%lx\n",
page->physical_page_number));
@ -3739,7 +3739,7 @@ fault_get_page(PageFaultContext& context)
// TODO: If memory is low, it might be a good idea to steal the page
// from our source cache -- if possible, that is.
FTRACE(("get new page, copy it, and put it into the topmost cache\n"));
page = vm_page_allocate_page(PAGE_STATE_FREE, true);
page = vm_page_allocate_page(PAGE_STATE_FREE);
// copy the page
vm_memcpy_physical_page(page->physical_page_number * B_PAGE_SIZE,

124
src/system/kernel/vm/vm_page.cpp
View File

@ -127,9 +127,7 @@ class UnreservePages : public AbstractTraceEntry {
class AllocatePage : public AbstractTraceEntry {
public:
AllocatePage(bool reserved)
:
fReserved(reserved)
AllocatePage()
{
Initialized();
}
@ -137,12 +135,7 @@ class AllocatePage : public AbstractTraceEntry {
virtual void AddDump(TraceOutput& out)
{
out.Print("page alloc");
if (fReserved)
out.Print(" reserved");
}
private:
bool fReserved;
};
@ -1511,7 +1504,7 @@ page_writer(void* /*unused*/)
static vm_page *
find_page_candidate(struct vm_page &marker, bool stealActive)
find_page_candidate(struct vm_page &marker)
{
MutexLocker locker(sPageLock);
page_queue *queue;
@ -1521,10 +1514,6 @@ find_page_candidate(struct vm_page &marker, bool stealActive)
// Get the first free pages of the (in)active queue
queue = &sInactivePageQueue;
page = sInactivePageQueue.head;
if (page == NULL && stealActive) {
queue = &sActivePageQueue;
page = sActivePageQueue.head;
}
} else {
// Get the next page of the current queue
if (marker.state == PAGE_STATE_INACTIVE)
@ -1542,10 +1531,7 @@ find_page_candidate(struct vm_page &marker, bool stealActive)
}
while (page != NULL) {
if (!is_marker_page(page)
&& (page->state == PAGE_STATE_INACTIVE
|| (stealActive && page->state == PAGE_STATE_ACTIVE
&& page->wired_count == 0))) {
if (!is_marker_page(page) && page->state == PAGE_STATE_INACTIVE) {
// we found a candidate, insert marker
marker.state = queue == &sActivePageQueue
? PAGE_STATE_ACTIVE : PAGE_STATE_INACTIVE;
@ -1554,10 +1540,6 @@ find_page_candidate(struct vm_page &marker, bool stealActive)
}
page = page->queue_next;
if (page == NULL && stealActive && queue != &sActivePageQueue) {
queue = &sActivePageQueue;
page = sActivePageQueue.head;
}
}
return NULL;
@ -1565,7 +1547,7 @@ find_page_candidate(struct vm_page &marker, bool stealActive)
static bool
steal_page(vm_page *page, bool stealActive)
steal_page(vm_page *page)
{
// try to lock the page's cache
if (vm_cache_acquire_locked_page_cache(page, false) == NULL)
@ -1575,9 +1557,7 @@ steal_page(vm_page *page, bool stealActive)
MethodDeleter<VMCache> _2(page->cache, &VMCache::ReleaseRefLocked);
// check again if that page is still a candidate
if (page->state != PAGE_STATE_INACTIVE
&& (!stealActive || page->state != PAGE_STATE_ACTIVE
|| page->wired_count != 0))
if (page->state != PAGE_STATE_INACTIVE)
return false;
// recheck eventual last minute changes
@ -1608,10 +1588,8 @@ steal_page(vm_page *page, bool stealActive)
static size_t
steal_pages(vm_page **pages, size_t count, bool reserve)
steal_pages(vm_page **pages, size_t count)
{
size_t maxCount = count;
while (true) {
vm_page marker;
marker.type = PAGE_TYPE_DUMMY;
@ -1622,19 +1600,17 @@ steal_pages(vm_page **pages, size_t count, bool reserve)
size_t stolen = 0;
while (count > 0) {
vm_page *page = find_page_candidate(marker, false);
vm_page *page = find_page_candidate(marker);
if (page == NULL)
break;
if (steal_page(page, false)) {
if (reserve || stolen >= maxCount) {
MutexLocker _(sPageLock);
enqueue_page(&sFreePageQueue, page);
page->state = PAGE_STATE_FREE;
if (steal_page(page)) {
MutexLocker locker(sPageLock);
enqueue_page(&sFreePageQueue, page);
page->state = PAGE_STATE_FREE;
locker.Unlock();
T(StolenPage());
} else if (stolen < maxCount)
pages[stolen] = page;
T(StolenPage());
stolen++;
count--;
@ -1646,11 +1622,11 @@ steal_pages(vm_page **pages, size_t count, bool reserve)
MutexLocker locker(sPageLock);
if ((reserve && sReservedPages <= free_page_queue_count())
if (sReservedPages <= free_page_queue_count()
|| count == 0
|| ((!reserve && (sInactivePageQueue.count > 0))
|| free_page_queue_count() > sReservedPages))
|| free_page_queue_count() > sReservedPages) {
return stolen;
}
if (stolen && !tried && sInactivePageQueue.count > 0) {
count++;
@ -1681,7 +1657,7 @@ steal_pages(vm_page **pages, size_t count, bool reserve)
locker.Lock();
sPageDeficit--;
if (reserve && sReservedPages <= free_page_queue_count())
if (sReservedPages <= free_page_queue_count())
return stolen;
}
}
@ -2046,6 +2022,7 @@ vm_page_unreserve_pages(uint32 count)
They will only be handed out to someone who has actually reserved them.
This call returns as soon as the number of requested pages has been
reached.
The caller must not hold any cache lock or the function might deadlock.
*/
void
vm_page_reserve_pages(uint32 count)
@ -2065,7 +2042,7 @@ vm_page_reserve_pages(uint32 count)
count = sReservedPages - freePages;
locker.Unlock();
steal_pages(NULL, count + 1, true);
steal_pages(NULL, count + 1);
// we get one more, just in case we can do something someone
// else can't
}
@ -2090,10 +2067,8 @@ vm_page_try_reserve_pages(uint32 count)
}
// TODO: you must not have locked a cache when calling this function with
// reserved == false. See vm_cache_acquire_locked_page_cache().
vm_page *
vm_page_allocate_page(int pageState, bool reserved)
vm_page_allocate_page(int pageState)
{
page_queue *queue;
page_queue *otherQueue;
@ -2113,37 +2088,21 @@ vm_page_allocate_page(int pageState, bool reserved)
MutexLocker locker(sPageLock);
T(AllocatePage(reserved));
T(AllocatePage());
vm_page *page = NULL;
while (true) {
if (reserved || sReservedPages < free_page_queue_count()) {
page = dequeue_page(queue);
if (page == NULL) {
vm_page *page = dequeue_page(queue);
if (page == NULL) {
#if DEBUG_PAGE_QUEUE
if (queue->count != 0)
panic("queue %p corrupted, count = %d\n", queue, queue->count);
if (queue->count != 0)
panic("queue %p corrupted, count = %d\n", queue, queue->count);
#endif
// if the primary queue was empty, grab the page from the
// secondary queue
page = dequeue_page(otherQueue);
}
}
// if the primary queue was empty, grab the page from the
// secondary queue
page = dequeue_page(otherQueue);
if (page != NULL)
break;
if (reserved)
if (page == NULL)
panic("Had reserved page, but there is none!");
// steal one from the inactive list
locker.Unlock();
size_t stolen = steal_pages(&page, 1, false);
locker.Lock();
if (stolen > 0)
break;
}
if (page->cache != NULL)
@ -2165,31 +2124,6 @@ vm_page_allocate_page(int pageState, bool reserved)
}
/*! Allocates a number of pages and puts their pointers into the provided
array. All pages are marked busy.
Returns B_OK on success, and B_NO_MEMORY when there aren't any free
pages left to allocate.
*/
status_t
vm_page_allocate_pages(int pageState, vm_page **pages, uint32 numPages)
{
uint32 i;
for (i = 0; i < numPages; i++) {
pages[i] = vm_page_allocate_page(pageState, false);
if (pages[i] == NULL) {
// allocation failed, we need to free what we already have
while (i-- > 0)
vm_page_set_state(pages[i], pageState);
return B_NO_MEMORY;
}
}
return B_OK;
}
vm_page *
vm_page_allocate_page_run(int pageState, addr_t base, addr_t length)
{