paging I/O

NTFSD
1

I have set FO_WRITE_THROUGH and SL_WRITE_THROUGH, but why there is still
paging I/O in my filter driver?

2

Write-through allows caching. It just DISALLOWS caching of dirty
(unwritten) data. Thus, you see paging I/O because this is how the OS reads
and writes data from the cache.

Even if you specify no caching the file system is allowed to ignore this
request (try this on NTFS for an encrypted or compressed file and you will
see this behavior).

Regards,

Tony

Tony Mason
Consulting Partner
OSR Open Systems Resources, Inc.
http://www.osr.com

-----Original Message-----
From: Eric Chan [mailto:xxxxx@hotmail.com]
Sent: Saturday, April 27, 2002 2:20 AM
To: File Systems Developers
Subject: [ntfsd] paging I/O

I have set FO_WRITE_THROUGH and SL_WRITE_THROUGH, but why there is still
paging I/O in my filter driver?

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