Re: [PATCH v4] fuse: Add support for passthrough read/write

[Bernd Schubert <bernd.schubert@fastmail.fm>]

On 01/21/2016 01:16 AM, Nikhilesh Reddy wrote:
> Add support for filesystem passthrough read/write of files
> when enabled in userspace through the option FUSE_PASSTHROUGH.
> 
> There are many FUSE based filesystems that perform checks or
> enforce policy or perform some kind of decision making in certain
> functions like the "open" call but simply act as a "passthrough"
> when performing operations such as read or write.
> 
> When FUSE_PASSTHROUGH is enabled all the reads and writes
> to the fuse mount point go directly to the passthrough filesystem
> i.e a native filesystem that actually hosts the files rather than
> through the fuse daemon. All requests that aren't read/write still
> go thought the userspace code.
> 
> This allows for significantly better performance on read and writes.
> The difference in performance between fuse and the native lower
> filesystem is negligible.
> 
> There is also a significant cpu/power savings that is achieved which
> is really important on embedded systems that use fuse for I/O.
> 
> Signed-off-by: Nikhilesh Reddy <reddyn@codeaurora.org>

I think it is common style to add a change log between patch set
versions in the patch description.


Bernd