Re: [RFC][DATA] re "ongoing vm suckage"

[Linus Torvalds]

On Sat, 4 Aug 2001, Ben LaHaise wrote:
> On Fri, 3 Aug 2001, Linus Torvalds wrote:
>
> > For nicer interactive behaviour while flushing things out, the
> > inode_fsync() thing should really use "write_locked_buffers()". That's a
> > separate patch, though.
>
> Mildly better interactive performance, but absolutely horrid io
> throughput.  The system degrades to the point where blocks are getting
> flushed to disk at ~2MB/s vs the 80MB/s its capable of.  Not instrumented
> since I'm trying to actually relax.

That implies that we are trying to flush way too few buffers at a time and
do not get any overlapping IO.

Btw, how did you test this? Do you have a patch for inode_fsync() already?

		Linus