Patch: Tune "dir" a bit

[Scott Lovenberg]

On Fri, Mar 22, 2013 at 1:20 PM, Jeremy Allison <jra at samba.org> wrote:
> On Fri, Mar 22, 2013 at 02:37:31PM +0100, Volker Lendecke wrote:
>> Hi!
>>
>> Attached find a patch that makes trans2_findfirst take 10%
>> less user-space CPU. If someone has the time, can you try to
>> verify this improvement and push?
>
> Indeed this is a significant improvement - I'll push to
> autobuild and get a bug logged for 4.0.x and 3.6.x to
> get this change into production releases asap.
>
> Jeremy.

FWIW, I confirmed this on a VM because I was really curious.  The
difference is dramatic when IO is more costly (ie: on a VM running on
an old P4).  This is the same test that Volker ran:
---------------------------------------------------------------------------------------
[root at primary sambaTest]# time /usr/sbin/smbd -d0 -i
smbd version 3.5.10-125.el6 started.

real    13m11.306s
user    0m45.899s
sys     4m0.341s


[root at primary sambaTest]# time /opt/sambaTest/sbin/smbd -d0 -i
smbd version 4.1.0pre1-GIT-9624ca4 started.

real    13m51.811s
user    1m12.406s
sys     4m25.588s
---------------------------------------------------------------------------------------

Volker, well done!
-- 
Peace and Blessings,
-Scott.