Re: [PATCH] cifs: add .splice_write

[Andrés Souto]

I want to explain a bit what is the problem this patch solves.

Without it, I always obtain a transfer rate below 9MB/s when writing to a cifs share using splice syscall independently of the buffer size used. However, when reading from the cifs share, I obtain around 105 MB/s.

After applying the patch, the transfer rate I obtain writing to the cifs share depending on the buffer size is:

blocksize (kB)| transfer rate (MB/s)
--------------+----------------------
           64 | 51.52
          128 | 65.41
          256 | 76.64
          512 | 85.72
         1024 | 90.21