Re: [PATCH V8 00/33] loop: Issue O_DIRECT aio using bio_vec

[Andrew Morton]

On Thu, 25 Jul 2013 12:50:26 -0500 Dave Kleikamp <dave.kleikamp@xxxxxxxxxx> wrote:

> 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.

Do you have any performance numbers?

Does anyone care much about loop performance?  What's the value here?
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