Re: [PATCH 10/16] xfs: convert extent busy tracking to the generic group structure

[Dave Chinner <david@fromorbit.com>]

On Mon, Oct 14, 2024 at 06:21:21PM -0700, Darrick J. Wong wrote:
> On Tue, Oct 15, 2024 at 12:08:56PM +1100, Dave Chinner wrote:
> > On Thu, Oct 10, 2024 at 05:46:48PM -0700, Darrick J. Wong wrote:
> > > From: Christoph Hellwig <hch@lst.de>
> > > 
> > > Prepare for tracking busy RT extents by passing the generic group
> > > structure to the xfs_extent_busy_class tracepoints.
> > > 
> > > Signed-off-by: Christoph Hellwig <hch@lst.de>
> > > Reviewed-by: Darrick J. Wong <djwong@kernel.org>
> > > Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> > > Reviewed-by: Darrick J. Wong <djwong@kernel.org>
> > > Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> > > ---
> > >  fs/xfs/xfs_extent_busy.c |   12 +++++++-----
> > >  fs/xfs/xfs_trace.h       |   34 +++++++++++++++++++++-------------
> > >  2 files changed, 28 insertions(+), 18 deletions(-)
> > 
> > Subject is basically the same as the next patch - swap "busy"
> > and "extent" and they are the same. Perhaps this should be
> > called "Convert extent busy trace points to generic groups".
> 
> Done.
> 
> > > diff --git a/fs/xfs/xfs_extent_busy.c b/fs/xfs/xfs_extent_busy.c
> > > index 2806fc6ab4800d..ff10307702f011 100644
> > > --- a/fs/xfs/xfs_extent_busy.c
> > > +++ b/fs/xfs/xfs_extent_busy.c
> > > @@ -41,7 +41,7 @@ xfs_extent_busy_insert_list(
> > >  	new->flags = flags;
> > >  
> > >  	/* trace before insert to be able to see failed inserts */
> > > -	trace_xfs_extent_busy(pag, bno, len);
> > > +	trace_xfs_extent_busy(&pag->pag_group, bno, len);
> > >  
> > >  	spin_lock(&pag->pagb_lock);
> > >  	rbp = &pag->pagb_tree.rb_node;
> > > @@ -278,13 +278,13 @@ xfs_extent_busy_update_extent(
> > >  		ASSERT(0);
> > >  	}
> > >  
> > > -	trace_xfs_extent_busy_reuse(pag, fbno, flen);
> > > +	trace_xfs_extent_busy_reuse(&pag->pag_group, fbno, flen);
> > >  	return true;
> > >  
> > >  out_force_log:
> > >  	spin_unlock(&pag->pagb_lock);
> > >  	xfs_log_force(pag_mount(pag), XFS_LOG_SYNC);
> > > -	trace_xfs_extent_busy_force(pag, fbno, flen);
> > > +	trace_xfs_extent_busy_force(&pag->pag_group, fbno, flen);
> > >  	spin_lock(&pag->pagb_lock);
> > >  	return false;
> > >  }
> > > @@ -496,7 +496,8 @@ xfs_extent_busy_trim(
> > >  out:
> > >  
> > >  	if (fbno != *bno || flen != *len) {
> > > -		trace_xfs_extent_busy_trim(args->pag, *bno, *len, fbno, flen);
> > > +		trace_xfs_extent_busy_trim(&args->pag->pag_group, *bno, *len,
> > > +				fbno, flen);
> > 
> > Also, the more I see this sort of convert, the more I want to see a
> > pag_group(args->pag) helper to match with stuff like pag_mount() and
> > pag_agno()....
> 
> Me too.  I'll schedule /that/ transition for tomorrow, along with the
> patch folding that hch asked for.
> 
> I'm gonna assume you also want an rtg_group() that does the same for
> rtgroups?

I hadn't got that far yet, but I think that's probably a good idea.

-Dave.
-- 
Dave Chinner
david@fromorbit.com