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

From: Richard Weinberger
Date: Thu Jan 21 2016 - 07:46:21 EST

Am 21.01.2016 um 13:38 schrieb Bernd Schubert:
> 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@xxxxxxxxxxxxxx>
> I think it is common style to add a change log between patch set
> versions in the patch description.

And please slow down a bit. Collect a few review comments and then
do another version of your patch. :-)