QUERY_PATH_INFO what? what? what? what? what? what?

Amin Azez azez at ufomechanic.net
Fri Feb 22 11:22:43 GMT 2008

After double clicking on the shortcut to open the file I get the most
amazing display of seeming client forgetfulness:

7 times the windows XP client will do QUERY_PATH_INFO on the same parent
folder. (Along with 7 sets of WAN latency).

4 times it will do QUERY_PATH_INFO on the file being opened.

That's 8 seconds gone before it even opens the file
I wonder why it keeps repeating the QUERY_PATH_INFO.

Anyone know anything about this?

Attached is a vfs_cifs backend trace of opening a remote file from
clicking a desktop shortcut (which is a nice way to avoid all
explorer.exe's inquisitive calls)

The XP client is
The single VFS CIFS proxy is
The KDC and share server is

the subnets are WAN VPN'd with a latency between the two subnets is 53ms

It's and 19 seconds (at the close response) before the file displayed,
but some of the intervening operations VFS PROXY will do up-front when a
file is opened and cache the result, so thats no problem I hope.


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