8.1-STABLE: zfs and sendfile: problem still exists

[Andriy Gapon]

on 29/10/2010 12:04 Artemiev Igor said the following:
> Yep, this problem exists. You may workaround it via bumping up
> net.inet.tcp.sendspace up to 128k.  zfs sendfile is very ineffective. I have
> made a small investigation via DTrace, it reads MAXBSIZE chunks, but map in vm
> only one page (4K).  I.e. if you have a file with size 512K, sendfile make
> calls freebsd_zfs_read 128 times.

What svn revision of FreeBSD source tree did you test?

-- 
Andriy Gapon