On 6/11/2013 3:51 PM, J. Bruce Fields wrote:
On Sun, Jun 09, 2013 at 01:05:16PM +0530, Sandeep Joshi wrote:
Is there a reason as to why the nfsd server does not use splice in the
write calls - nfsd_vfs_write() ? Is there some structural limitation
or is it just something nobody got around to implementing ?
I have looked at the source back to the 2.6.x kernels and it seems
only nfsd_vfs_read() has ever used splice/sendfile.
http://lxr.linux.no/linux+v3.9.5/fs/nfsd/vfs.c
I don't actually know how splice_write works.... I assume to avoid a
copy we'd have to place the incoming write data into pages already
correctly aligned. That would be an interesting trick.
NFS-RDMA does that, by design. ;-)
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
