TDB on OpenBSD problem.

[MCCALL,DON (HP-USA,ex1)]

Thanks, Herb.
You're right, of course!

Hope this helps,
Don
 "Reason, not volume, is the primary
differentiator between a discussion, and an
argument."

-----Original Message-----
From: Herb Lewis [mailto:herb at chomps.engr.sgi.com]
Sent: Friday, May 04, 2001 2:12 PM
To: samba-technical at lists.samba.org
Subject: Re: TDB on OpenBSD problem.


"MCCALL,DON (HP-USA,ex1)" wrote:
> 
> Hi Tridge,
> I'm no programmer, and my understanding of mmapped files is slim, but I
> noted in the man page of mmap, after a discussion with one of my HP-UX
> buddies about buffercache vs page cache on HP-UX:
> 
>  The application must ensure correct synchronization when using mmap()
>       in conjunction with any other file access method, such as read() and
>       write(), standard input/output, and shmat().
> 
> So I added a call to msync() right before the call to test() to the test
> program, and with this I resolve the inconsistency on the 11.0 box I was
> seeing the error on.  Follows is the modified code:


Setting the MS_ASYNC flag instead of MS_SYNC should be sufficient as 
the read should then get if from the buffer cache but the msync call
doesn't have to wait for everything to go to physical disk.

-- 
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Herb Lewis                               Silicon Graphics 
Networking Engineer                      1600 Amphitheatre Pkwy MS-510
Strategic Software Organization          Mountain View, CA  94043-1351
herb at sgi.com                             Tel: 650-933-2177
http://www.sgi.com                       Fax: 650-932-2177          
======================================================================