Re: realtime ( was RE: unexpected high fragmentation, any ideas? )

[Nathan Scott <nathans@xxxxxxx>]

On Wed, Apr 06, 2005 at 08:49:54PM -0500, Steve Lord wrote:
>  o In order to get a file to live on the realtime subvolume, you have
>    to use a special ioctl call on the file descriptor after it is
>    opened and before any space is allocated.

Actually, theres an easy way to do this now which doesn't require
applications to know about realtime volumes - a directory can have
the "realtime-inherit" flag set on it (e.g. via xfs_io) and files
subsequently created in that directory will automatically be marked
as realtime (at creation time).

I would be surprised if there aren't one or two bugs remaining in
the realtime port for Linux, as Steve pointed out, but there is a
decent foundation with years of testing on IRIX for the core code,
so it shouldn't be too hard to knock out any remaining issues (if
someone wanted to give it a go..)

cheers.

-- 
Nathan