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fuse: use iov_iter based generic splice helpers

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The default splice implementation is grossly inefficient and the iter based
ones work just fine, so use those instead.  I've measured an 8x speedup for
splice write (with len = 128k).

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2019-01-24 10:40:17 +01:00
parent 23c94e1cdc
commit 3c3db095b6
1 changed files with 3 additions and 1 deletions
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4
fs/fuse/file.c
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@ -3156,6 +3156,7 @@ static const struct file_operations fuse_file_operations = {
.lock = fuse_file_lock,
.flock = fuse_file_flock,
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = fuse_file_ioctl,
.compat_ioctl = fuse_file_compat_ioctl,
.poll = fuse_file_poll,
@ -3174,11 +3175,12 @@ static const struct file_operations fuse_direct_io_file_operations = {
.fsync = fuse_fsync,
.lock = fuse_file_lock,
.flock = fuse_file_flock,
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = fuse_file_ioctl,
.compat_ioctl = fuse_file_compat_ioctl,
.poll = fuse_file_poll,
.fallocate = fuse_file_fallocate,
/* no splice_read */
};
static const struct address_space_operations fuse_file_aops = {