Re: [PATCH v3 00/22] loop: Issue O_DIRECT aio using bio_vec

From: Dave Chinner
Date: Mon Oct 22 2012 - 20:07:49 EST

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


Dave Chinner
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