Mounts to Windows 7 and "out of memory" or "insufficient server resources"

Jeremy Allison jra at
Tue Sep 27 17:01:55 MDT 2011

On Tue, Sep 27, 2011 at 04:36:22PM -0500, Steve French wrote:
> FYI - The cifs async write in 3.0 seems to exacerbate problems running
> out of memory (apparently) on the Windows 7 system (running as a
> server) after a large file copy to the server completes.   I have been
> able to reproduce the same problem on Windows Vista Service Pack 2
> (which is a good news/bad news story since my earlier testing on
> Windows Vista showed hangs on some requests rather than returning out
> of memory).  Does not seem to be a problem with any of the Windows
> server versions just Windows 7 and Vista so far.
> As Pavel noted in an earlier note, increasing MaxWorkItems to 4096 in
> the Windows registry solves this.
> The cifs async write code does increase large file copy speed
> dramatically (more than 15% in most environments) - but we are working
> through how to handle the Windows7/WindowsVista problem to see if
> there are workarounds.

Have you notified the Microsoft engineers about this ? I can
give you the right names to bug...


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