CcUpdateExternalCacheInfoEx function (ntifs.h)
A file system calls CcUpdateExternalCacheInfoEx to ask the cache manager (Cc) to update dirty page statistics in the specified external cache information structure.
Syntax
NTSTATUS CcUpdateExternalCacheInfoEx(
PVOID ExternalCacheContext,
PCC_DIRTY_PAGES_INFO DirtyPagesInfo
);
Parameters
ExternalCacheContext
[in] Pointer to the context that identifies the external cache structure to be updated. This context was returned by CcRegisterExternalCacheEx.
DirtyPagesInfo
[in] Pointer to a CC_DIRTY_PAGES_INFO structure that contains updated information about dirty page statistics. Cc ignores the dirty page thresholds part of this structure.
Return value
CcUpdateExternalCacheInfoEx returns STATUS_SUCCESS if the operation succeeds. Otherwise, it returns an appropriate error code such as the following.
| Return code | Description |
|---|---|
| STATUS_INVALID_PARAMETER | The version in DirtyPagesInfo is invalid. |
Remarks
Cc needs these updated values so it can accurately set the dirty page threshold and target.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11, version 24H2 |
| Header | ntifs.h |