fuse: implement perform_write
authorNick Piggin <npiggin@suse.de>
Wed, 30 Apr 2008 07:54:42 +0000 (00:54 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 30 Apr 2008 15:29:50 +0000 (08:29 -0700)
commitea9b9907b82a09bd1a708004454f7065de77c5b0
tree5a8a4f1e41efac6a2c1292adc3aa4a01f2ffd62f
parent854512ec358f291bcadd7daea10d6bf3704933de
fuse: implement perform_write

Introduce fuse_perform_write.  With fusexmp (a passthrough filesystem), large
(1MB) writes into a backing tmpfs filesystem are sped up by almost 4 times
(256MB/s vs 71MB/s).

[mszeredi@suse.cz]:

 - split into smaller functions
 - testing
 - duplicate generic_file_aio_write(), so that there's no need to add a
   new ->perform_write() a_op.  Comment from hch.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/fuse/file.c