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sys: FspFsvolClose: convert CLOSE requests to synchronous when above the IOQ watermark

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This commit is contained in:
Bill Zissimopoulos 2021-01-18 15:07:57 -08:00
parent 1dbcae3985
commit 0af0bfbe7c
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3 changed files with 14 additions and 2 deletions
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5
src/sys/close.c
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@ -84,8 +84,9 @@ static NTSTATUS FspFsvolClose(
FspFileDescDelete(FileDesc); /* this will also close the MainFileObject if any */
FspFileNodeDereference(FileNode);
/* if we are closing files in the context of a rename make it synchronous */
if (FspFsvolDeviceFileRenameIsAcquiredExclusive(FsvolDeviceObject))
/* if closing in the context of a rename or IOQ is above the watermark make it synchronous */
if (FspFsvolDeviceFileRenameIsAcquiredExclusive(FsvolDeviceObject) ||
FspIoqPendingAboveWatermark(FspFsvolDeviceExtension(FsvolDeviceObject)->Ioq, 50))
{
/* acquire ownership of the Request */
Request->Hint = (UINT_PTR)Irp;

1
src/sys/driver.h
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@ -953,6 +953,7 @@ BOOLEAN FspIoqPostIrpEx(FSP_IOQ *Ioq, PIRP Irp, BOOLEAN BestEffort, NTSTATUS *PR
PIRP FspIoqNextPendingIrp(FSP_IOQ *Ioq, PIRP BoundaryIrp, PLARGE_INTEGER Timeout,
PIRP CancellableIrp);
ULONG FspIoqPendingIrpCount(FSP_IOQ *Ioq);
BOOLEAN FspIoqPendingAboveWatermark(FSP_IOQ *Ioq, ULONG Watermark);
BOOLEAN FspIoqStartProcessingIrp(FSP_IOQ *Ioq, PIRP Irp);
PIRP FspIoqEndProcessingIrp(FSP_IOQ *Ioq, UINT_PTR IrpHint);
ULONG FspIoqProcessIrpCount(FSP_IOQ *Ioq);

10
src/sys/ioq.c
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@ -643,6 +643,16 @@ ULONG FspIoqPendingIrpCount(FSP_IOQ *Ioq)
return Result;
}
BOOLEAN FspIoqPendingAboveWatermark(FSP_IOQ *Ioq, ULONG Watermark)
{
BOOLEAN Result;
KIRQL Irql;
KeAcquireSpinLock(&Ioq->SpinLock, &Irql);
Result = Watermark < 100 * Ioq->PendingIrpCount / Ioq->PendingIrpCapacity;
KeReleaseSpinLock(&Ioq->SpinLock, Irql);
return Result;
}
BOOLEAN FspIoqStartProcessingIrp(FSP_IOQ *Ioq, PIRP Irp)
{
NTSTATUS Result;