Re: DMAPI dm_set_region

[Dean Roehrich <roehrich@sgi.com>]

>From:  "Francis Qu" <francis@raidzone.com>
>When DMAPI application tries to do dm_set_region on a file which is opened for
> write, both DMAPI application and the user application doing the write operat
>ion are blocked. The DMAPI application won't come back from dm_set_region util
>l the user cancels the write job.

What are you using to hold the file open?  It is just an open(O_RDWR), or are
you also currently in a write(2) or do you currently have it mmaped?  If
mmapped, is it private or shared?

Can you give me a small C test program to hold the file open in a way which
allows this behavior to be seen?

> Is it the way DMAPI works?

Doesn't sound like desirable behavior :)

Dean