Re: [Virtio-fs] [PATCH] virtiofsd: Use --thread-pool-size=0 to mean no thread pool

[Vivek Goyal <vgoyal@redhat.com>]

On Mon, Nov 09, 2020 at 10:11:02AM +0000, Dr. David Alan Gilbert wrote:
> * Vivek Goyal (vgoyal@redhat.com) wrote:
> > Right now we create a thread pool and main thread hands over the request
> > to thread in thread pool to process. Number of threads in thread pool
> > can be managed by option --thread-pool-size.
> > 
> > There is a chance that in case of some workloads, we might get better
> > performance if we don't handover the request to a different thread
> > and process in the context of thread receiving the request.
> > 
> > To implement that, redefine the meaning of --thread-pool-size=0 to
> > mean that don't use a thread pool. Instead process the request in
> > the context of thread receiving request from the queue.
> > 
> > I can't think how --thread-pool-size=0 is useful and hence using
> > that. If it is already useful somehow, I could look at defining
> > a new option say "--no-thread-pool".
> > 
> > I think this patch will be used more as a debug help to do comparison
> > when it is more effecient to do not hand over the requests to a
> > thread pool.
> > 
> > Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
> 
> I think this is OK, but you need to fix the style to match qemu rather
> than kernel style.
> (See qemu's scripts/checpatch.pl)

Sure. I just posted V2 of the patch and took care of all the issues
reported by qemu's scripts/checkpatch.pl.

Vivek