how to cause pagion IO to be retried

NTFSD
1

Hi all!

In my FS filter driver I have a background task that is reading/writing to
file using non-cached IO.

I don’t want external paging IO to be performed at this time. On the other
hand I don’t want to fail it with

STATUS_ACCESS_DENIED or STATUS_DEVICE_BUSY since it causes “Delayed write
failed”

message and potential data loss. I tried to return
STATUS_INSUFFICIENT_RESOURCES, but

after about 30-40 retries the same message is popped and MM finishes its
retries.

Is there any way to cause infinite paging IO retries?

Thanks,

Dani

2

Dani Polovets wrote:

Hi all!

In my FS filter driver I have a background task that is reading/writing
to file using non-cached IO.

I don’t want external paging IO to be performed at this time. On the
other hand I don’t want to fail it with

STATUS_ACCESS_DENIED or STATUS_DEVICE_BUSY since it causes “Delayed
write failed”

message and potential data loss. I tried to return
STATUS_INSUFFICIENT_RESOURCES, but

after about 30-40 retries the same message is popped and MM finishes its
retries.

STATUS_FILE_LOCK_CONFLICT will tell MM to retry. Not sure if there is a
limit to the retry count though.

Pete

Is there any way to cause infinite paging IO retries?

Thanks,

Dani

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