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[NTOS:MM] Have the legacy Mm be less greedy about the number of pages it wants

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This commit is contained in:
Jérôme Gardou 2020-12-07 11:42:47 +01:00
parent fb07802956
commit aab24ed1b1
1 changed files with 8 additions and 25 deletions
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33
ntoskrnl/mm/balance.c
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@ -28,7 +28,6 @@ MM_ALLOCATION_REQUEST, *PMM_ALLOCATION_REQUEST;
MM_MEMORY_CONSUMER MiMemoryConsumers[MC_MAXIMUM];
static ULONG MiMinimumAvailablePages;
static ULONG MiNrTotalPages;
static LIST_ENTRY AllocationListHead;
static KSPIN_LOCK AllocationListLock;
static ULONG MiMinimumPagesPerRun;
@ -49,12 +48,10 @@ MmInitializeBalancer(ULONG NrAvailablePages, ULONG NrSystemPages)
InitializeListHead(&AllocationListHead);
KeInitializeSpinLock(&AllocationListLock);
MiNrTotalPages = NrAvailablePages;
/* Set up targets. */
MiMinimumAvailablePages = 256;
MiMinimumPagesPerRun = 256;
MiMemoryConsumers[MC_USER].PagesTarget = NrAvailablePages - MiMinimumAvailablePages;
MiMemoryConsumers[MC_USER].PagesTarget = NrAvailablePages / 2;
}
CODE_SEG("INIT")
@ -120,15 +117,12 @@ MiTrimMemoryConsumer(ULONG Consumer, ULONG InitialTarget)
Target = (ULONG)max(Target, MiMinimumAvailablePages - MmAvailablePages);
}
/* Don't be too greedy if we're not in a hurry */
if (MmAvailablePages > MiMinimumAvailablePages)
Target = min(Target, 256);
if (Target)
{
if (!InitialTarget)
{
/* If there was no initial target,
* swap at least MiMinimumPagesPerRun */
Target = max(Target, MiMinimumPagesPerRun);
}
/* Now swap the pages out */
Status = MiMemoryConsumers[Consumer].Trim(Target, 0, &NrFreedPages);
@ -138,21 +132,10 @@ MiTrimMemoryConsumer(ULONG Consumer, ULONG InitialTarget)
{
KeBugCheck(MEMORY_MANAGEMENT);
}
/* Update the target */
if (NrFreedPages < Target)
Target -= NrFreedPages;
else
Target = 0;
/* Return the remaining pages needed to meet the target */
return Target;
}
else
{
/* Initial target is zero and we don't have anything else to add */
return 0;
}
/* Return the page count needed to be freed to meet the initial target */
return (InitialTarget > NrFreedPages) ? (InitialTarget - NrFreedPages) : 0;
}
NTSTATUS