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[NTOSKRNL]

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Fix the way the paging IO MDLs are issued by Cc on read.
Similar to r75834.
Fixes tests from r75842.

svn path=/trunk/; revision=75844
This commit is contained in:
Pierre Schweitzer 2017-09-15 11:49:55 +00:00
parent 2cbaba6989
commit f62d7e0c24
1 changed files with 22 additions and 7 deletions
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29
reactos/ntoskrnl/cc/copy.c
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@ -86,14 +86,29 @@ CcReadVirtualAddress (
return STATUS_INSUFFICIENT_RESOURCES;
}
MmBuildMdlForNonPagedPool(Mdl);
Mdl->MdlFlags |= MDL_IO_PAGE_READ;
KeInitializeEvent(&Event, NotificationEvent, FALSE);
Status = IoPageRead(Vacb->SharedCacheMap->FileObject, Mdl, &Vacb->FileOffset, &Event, &IoStatus);
if (Status == STATUS_PENDING)
Status = STATUS_SUCCESS;
_SEH2_TRY
{
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
Status = IoStatus.Status;
MmProbeAndLockPages(Mdl, KernelMode, IoWriteAccess);
}
_SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
KeBugCheck(CACHE_MANAGER);
} _SEH2_END;
if (NT_SUCCESS(Status))
{
Mdl->MdlFlags |= MDL_IO_PAGE_READ;
KeInitializeEvent(&Event, NotificationEvent, FALSE);
Status = IoPageRead(Vacb->SharedCacheMap->FileObject, Mdl, &Vacb->FileOffset, &Event, &IoStatus);
if (Status == STATUS_PENDING)
{
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
Status = IoStatus.Status;
}
MmUnlockPages(Mdl);
}
IoFreeMdl(Mdl);