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Increase the write back count in CcRosFlushDirtyPages

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according to the dirty page count from cache manager.

svn path=/trunk/; revision=4086
This commit is contained in:
Hartmut Birr 2003-01-30 18:30:53 +00:00
parent 945450876a
commit ec65b164ca
1 changed files with 37 additions and 2 deletions
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39
reactos/ntoskrnl/cc/view.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: view.c,v 1.55 2003/01/11 15:24:38 hbirr Exp $
/* $Id: view.c,v 1.56 2003/01/30 18:30:53 hbirr Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/cc/view.c
@ -69,7 +69,7 @@
* over a bitmap. If CACHE_BITMAP is used, the size of the mdl mapping region
* must be reduced (ntoskrnl\mm\mdl.c, MI_MDLMAPPING_REGION_SIZE).
*/
// #define CACHE_BITMAP
//#define CACHE_BITMAP
#define ROUND_UP(N, S) ((((N) + (S) - 1) / (S)) * (S))
#define ROUND_DOWN(N, S) (((N) % (S)) ? ROUND_UP(N, S) - S : N)
@ -82,6 +82,7 @@ static LIST_ENTRY DirtySegmentListHead;
static LIST_ENTRY CacheSegmentListHead;
static LIST_ENTRY CacheSegmentLRUListHead;
static LIST_ENTRY ClosedListHead;
static ULONG DirtyPageCount=0;
static FAST_MUTEX ViewLock;
@ -123,6 +124,7 @@ CcRosFlushCacheSegment(PCACHE_SEGMENT CacheSegment)
KeAcquireSpinLock(&CacheSegment->Bcb->BcbLock, &oldIrql);
CacheSegment->Dirty = FALSE;
RemoveEntryList(&CacheSegment->DirtySegmentListEntry);
DirtyPageCount -= CacheSegment->Bcb->CacheSegmentSize / PAGE_SIZE;
CacheSegment->ReferenceCount--;
KeReleaseSpinLock(&CacheSegment->Bcb->BcbLock, oldIrql);
ExReleaseFastMutex(&ViewLock);
@ -141,12 +143,35 @@ CcRosFlushDirtyPages(ULONG Target, PULONG Count)
ULONG PagesPerSegment;
BOOLEAN Locked;
NTSTATUS Status;
static ULONG WriteCount[4] = {0, 0, 0, 0};
ULONG NewTarget;
DPRINT("CcRosFlushDirtyPages(Target %d)\n", Target);
(*Count) = 0;
ExAcquireFastMutex(&ViewLock);
WriteCount[0] = WriteCount[1];
WriteCount[1] = WriteCount[2];
WriteCount[2] = WriteCount[3];
WriteCount[3] = 0;
NewTarget = WriteCount[0] + WriteCount[1] + WriteCount[2];
if (NewTarget < DirtyPageCount)
{
NewTarget = (DirtyPageCount - NewTarget + 3) / 4;
WriteCount[0] += NewTarget;
WriteCount[1] += NewTarget;
WriteCount[2] += NewTarget;
WriteCount[3] += NewTarget;
}
NewTarget = WriteCount[0];
Target = max(NewTarget, Target);
current_entry = DirtySegmentListHead.Flink;
if (current_entry == &DirtySegmentListHead)
{
@ -184,6 +209,10 @@ CcRosFlushDirtyPages(ULONG Target, PULONG Count)
ExAcquireFastMutex(&ViewLock);
current_entry = DirtySegmentListHead.Flink;
}
if (*Count < NewTarget)
{
WriteCount[1] += (NewTarget - *Count);
}
ExReleaseFastMutex(&ViewLock);
DPRINT("CcRosFlushDirtyPages() finished\n");
@ -276,6 +305,7 @@ CcRosReleaseCacheSegment(PBCB Bcb,
if (!WasDirty && CacheSeg->Dirty)
{
InsertTailList(&DirtySegmentListHead, &CacheSeg->DirtySegmentListEntry);
DirtyPageCount += Bcb->CacheSegmentSize / PAGE_SIZE;
}
RemoveEntryList(&CacheSeg->CacheSegmentLRUListEntry);
InsertTailList(&CacheSegmentLRUListHead, &CacheSeg->CacheSegmentLRUListEntry);
@ -351,6 +381,7 @@ CcRosMarkDirtyCacheSegment(PBCB Bcb, ULONG FileOffset)
{
ExAcquireFastMutex(&ViewLock);
InsertTailList(&DirtySegmentListHead, &CacheSeg->DirtySegmentListEntry);
DirtyPageCount += Bcb->CacheSegmentSize / PAGE_SIZE;
ExReleaseFastMutex(&ViewLock);
}
else
@ -395,6 +426,7 @@ CcRosUnmapCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty)
{
ExAcquireFastMutex(&ViewLock);
InsertTailList(&DirtySegmentListHead, &CacheSeg->DirtySegmentListEntry);
DirtyPageCount += Bcb->CacheSegmentSize / PAGE_SIZE;
ExReleaseFastMutex(&ViewLock);
}
@ -754,6 +786,8 @@ CcRosFreeCacheSegment(PBCB Bcb, PCACHE_SEGMENT CacheSeg)
if (CacheSeg->Dirty)
{
RemoveEntryList(&CacheSeg->DirtySegmentListEntry);
DirtyPageCount -= Bcb->CacheSegmentSize / PAGE_SIZE;
}
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
ExReleaseFastMutex(&ViewLock);
@ -883,6 +917,7 @@ CcRosDeleteFileCache(PFILE_OBJECT FileObject, PBCB Bcb)
if (current->Dirty)
{
RemoveEntryList(&current->DirtySegmentListEntry);
DirtyPageCount -= Bcb->CacheSegmentSize / PAGE_SIZE;
DPRINT1("Freeing dirty segment\n");
}
InsertHeadList(&FreeList, &current->BcbSegmentListEntry);