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Hervé Poussineau <poussine@freesurf.fr>

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Use fast mutexes instead of spin locks because the file system callbacks shouldn't be called at DISPATCH_LEVEL.

svn path=/trunk/; revision=13357
This commit is contained in:
Filip Navara 2005-01-28 21:17:11 +00:00
parent 66044ade6b
commit 00ae7e938d
1 changed files with 11 additions and 12 deletions
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23
reactos/ntoskrnl/io/fs.c
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@ -1,4 +1,4 @@
/* $Id:$ /* $Id$
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -35,7 +35,7 @@ typedef struct _FS_CHANGE_NOTIFY_ENTRY
static ERESOURCE FileSystemListLock; static ERESOURCE FileSystemListLock;
static LIST_ENTRY FileSystemListHead; static LIST_ENTRY FileSystemListHead;
static KSPIN_LOCK FsChangeNotifyListLock; static FAST_MUTEX FsChangeNotifyListLock;
static LIST_ENTRY FsChangeNotifyListHead; static LIST_ENTRY FsChangeNotifyListHead;
#define TAG_FILE_SYSTEM TAG('F', 'S', 'Y', 'S') #define TAG_FILE_SYSTEM TAG('F', 'S', 'Y', 'S')
@ -178,7 +178,7 @@ IoInitFileSystemImplementation(VOID)
ExInitializeResourceLite(&FileSystemListLock); ExInitializeResourceLite(&FileSystemListLock);
InitializeListHead(&FsChangeNotifyListHead); InitializeListHead(&FsChangeNotifyListHead);
KeInitializeSpinLock(&FsChangeNotifyListLock); ExInitializeFastMutex(&FsChangeNotifyListLock);
} }
@ -709,9 +709,8 @@ IopNotifyFileSystemChange(PDEVICE_OBJECT DeviceObject,
{ {
PFS_CHANGE_NOTIFY_ENTRY ChangeEntry; PFS_CHANGE_NOTIFY_ENTRY ChangeEntry;
PLIST_ENTRY Entry; PLIST_ENTRY Entry;
KIRQL oldlvl;
KeAcquireSpinLock(&FsChangeNotifyListLock,&oldlvl); ExAcquireFastMutex(&FsChangeNotifyListLock);
Entry = FsChangeNotifyListHead.Flink; Entry = FsChangeNotifyListHead.Flink;
while (Entry != &FsChangeNotifyListHead) while (Entry != &FsChangeNotifyListHead)
{ {
@ -721,7 +720,7 @@ IopNotifyFileSystemChange(PDEVICE_OBJECT DeviceObject,
Entry = Entry->Flink; Entry = Entry->Flink;
} }
KeReleaseSpinLock(&FsChangeNotifyListLock,oldlvl); ExReleaseFastMutex(&FsChangeNotifyListLock);
} }
@ -743,9 +742,10 @@ IoRegisterFsRegistrationChange(IN PDRIVER_OBJECT DriverObject,
Entry->DriverObject = DriverObject; Entry->DriverObject = DriverObject;
Entry->FSDNotificationProc = FSDNotificationProc; Entry->FSDNotificationProc = FSDNotificationProc;
ExInterlockedInsertHeadList(&FsChangeNotifyListHead, ExAcquireFastMutex(&FsChangeNotifyListLock);
&Entry->FsChangeNotifyList, InsertHeadList(&FsChangeNotifyListHead,
&FsChangeNotifyListLock); &Entry->FsChangeNotifyList);
ExReleaseFastMutex(&FsChangeNotifyListLock);
return(STATUS_SUCCESS); return(STATUS_SUCCESS);
} }
@ -760,7 +760,6 @@ IoUnregisterFsRegistrationChange(IN PDRIVER_OBJECT DriverObject,
{ {
PFS_CHANGE_NOTIFY_ENTRY ChangeEntry; PFS_CHANGE_NOTIFY_ENTRY ChangeEntry;
PLIST_ENTRY Entry; PLIST_ENTRY Entry;
KIRQL oldlvl;
Entry = FsChangeNotifyListHead.Flink; Entry = FsChangeNotifyListHead.Flink;
while (Entry != &FsChangeNotifyListHead) while (Entry != &FsChangeNotifyListHead)
@ -769,9 +768,9 @@ IoUnregisterFsRegistrationChange(IN PDRIVER_OBJECT DriverObject,
if (ChangeEntry->DriverObject == DriverObject && if (ChangeEntry->DriverObject == DriverObject &&
ChangeEntry->FSDNotificationProc == FSDNotificationProc) ChangeEntry->FSDNotificationProc == FSDNotificationProc)
{ {
KeAcquireSpinLock(&FsChangeNotifyListLock,&oldlvl); ExAcquireFastMutex(&FsChangeNotifyListLock);
RemoveEntryList(Entry); RemoveEntryList(Entry);
KeReleaseSpinLock(&FsChangeNotifyListLock,oldlvl); ExReleaseFastMutex(&FsChangeNotifyListLock);
ExFreePool(Entry); ExFreePool(Entry);
return; return;