[PATCH] Fix bug 9412 - SMB2 server doesn't support recvfile.

[Volker Lendecke]

Hello, Jones!

On Mon, Mar 31, 2014 at 05:34:14PM +0800, Jones wrote:
> Excuse me to recall this old thread,
> i am trying to find bottleneck with samba-4.0.5 in the linux box,
> the iometer access spec is set to 512bytes sequential write.
> 
> And my samba-4.0.5 is patched with Bug#9412,
> https://bugzilla.samba.org/show_bug.cgi?id=9412

While I can't really comment on this specific issue, let me
point out that Samba master has seen some really significant
performance improvements, in particular for small CPUs.
Just last week I did a comparison of 4.0.something against
master with async I/O, and the user-space CPU had dropped by
roughly half. This was a bit comparing Apples and Oranges,
but the changes were significant. So it might be worth a
look at master, in particular as there will pretty soon be
patches to use tdb mutexes instead of fcntl for tdb locking.

With best regards,

Volker Lendecke

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