[0.4.8] cherry-pick [NTOSKRNL] Don't make CcScheduleReadAhead() too noisy

HeisSpiter · JoachimHenze · commit e1d637265108 · 2018-02-19T14:54:12.000+01:00
cherry-picked by Joachim Henze
diff --git a/ntoskrnl/cc/cacheman.c b/ntoskrnl/cc/cacheman.c
@@ -165,6 +165,7 @@ CcScheduleReadAhead (
     LARGE_INTEGER NewOffset;
     PROS_SHARED_CACHE_MAP SharedCacheMap;
     PPRIVATE_CACHE_MAP PrivateCacheMap;
+    static ULONG Warn;
 
     SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
     PrivateCacheMap = FileObject->PrivateCacheMap;
@@ -214,7 +215,7 @@ CcScheduleReadAhead (
         {
             /* FIXME: handle the other cases */
             KeReleaseSpinLock(&PrivateCacheMap->ReadAheadSpinLock, OldIrql);
-	        UNIMPLEMENTED;
+	        if (!Warn++) UNIMPLEMENTED;
             return;
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -165,6 +165,7 @@ CcScheduleReadAhead (`
`165`	`165`	`LARGE_INTEGER NewOffset;`
`166`	`166`	`PROS_SHARED_CACHE_MAP SharedCacheMap;`
`167`	`167`	`PPRIVATE_CACHE_MAP PrivateCacheMap;`
	`168`	`+ static ULONG Warn;`
`168`	`169`
`169`	`170`	`SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;`
`170`	`171`	`PrivateCacheMap = FileObject->PrivateCacheMap;`
`@@ -214,7 +215,7 @@ CcScheduleReadAhead (`
`214`	`215`	`{`
`215`	`216`	`/* FIXME: handle the other cases */`
`216`	`217`	`KeReleaseSpinLock(&PrivateCacheMap->ReadAheadSpinLock, OldIrql);`
`217`		`- UNIMPLEMENTED;`
	`218`	`+ if (!Warn++) UNIMPLEMENTED;`
`218`	`219`	`return;`
`219`	`220`	`}`
`220`	`221`	`}`