Re: RESVSP problems

Łukasz Fibinger
2007-05-07T18:58:53Z

On Monday 07 of May 2007, you wrote:
> You've probably hit:
> http://oss.sgi.com/bugzilla/show_bug.cgi?id=418
> unwritten extents remain unwritten after mmap() modifies them
>
> Bug dchinner about it... ;-)

Dave, consider it a bugging from my humble self :-)

> yeah... ISTR that the arguments are funky. I can't remember if it's a
> bug or not. :) FWIW, allocsp just writes zeros to the file, so you
> could do it just as well from userspace w/ no fancy ioctls... ALLOCSP
> is a bit pointless if you ask me... though maybe someone knows why it's
> there :)

Let me say that I have noticed that using ALLOCSP seems to create less extents
than posix_fallocate/manual zeroing.

Thanks for your answer. Incidentally, I'm really happy that XFS has been
bestowed upon linux users. Thanks for all your work, guys :-)

Cheers,

Luke