On 10/22/2012 07:07 PM, Dave Chinner wrote:

On Mon, Oct 22, 2012 at 10:15:00AM -0500, Dave Kleikamp wrote:

quoted

This is the current version of the patchset I presented at the LSF-MM
Summit in San Francisco in April. I apologize for letting it go so
long before re-submitting.

This patchset was begun by Zach Brown and was originally submitted for
review in October, 2009. Feedback was positive, and I have picked up
where he left off, porting his patches to the latest mainline kernel
and adding support more file systems.

This patch series adds a kernel interface to fs/aio.c so that kernel code can
issue concurrent asynchronous IO to file systems.  It adds an aio command and
file system methods which specify io memory with pages instead of userspace
addresses.

This series was written to reduce the current overhead loop imposes by
performing synchronus buffered file system IO from a kernel thread.  These
patches turn loop into a light weight layer that translates bios into iocbs.

I note that there is no support for XFS in this patch set. Is there
a particular problem that prevents XFS from being converted, or it
just hasn't been done?

It just hasn't been done. It wasn't one of the trivial ones so I put it
off at first, and after that, it's an oversight. I'll follow up with an
xfs patch for your review.

Thanks,
Shaggy

Cheers,

Dave.