linux-kernel - Re: [PATCH 6/7] sctp: Convert to genradix

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Date:   Fri, 18 Jan 2019 11:35:34 -0200
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Neil Horman <nhorman@...driver.com>
Cc:     Kent Overstreet <kent.overstreet@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, Vlad Yasevich <vyasevich@...il.com>,
        linux-sctp@...r.kernel.org
Subject: Re: [PATCH 6/7] sctp: Convert to genradix

On Fri, Jan 18, 2019 at 08:10:22AM -0500, Neil Horman wrote:
> On Tue, Jan 15, 2019 at 12:29:26PM -0200, Marcelo Ricardo Leitner wrote:
> > On Mon, Dec 17, 2018 at 04:00:21PM -0500, Kent Overstreet wrote:
> > > On Mon, Dec 17, 2018 at 12:50:01PM -0800, Andrew Morton wrote:
> > > > On Mon, 17 Dec 2018 08:19:28 -0500 Kent Overstreet <kent.overstreet@...il.com> wrote:
> > > > 
> > > > > @@ -535,9 +470,6 @@ int sctp_send_add_streams(struct sctp_association *asoc,
> > > > >  		goto out;
> > > > >  	}
> > > > >  
> > > > > -	stream->incnt = incnt;
> > > > > -	stream->outcnt = outcnt;
> > > > > -
> > > > >  	asoc->strreset_outstanding = !!out + !!in;
> > > > >  
> > > > 
> > > > I'm seeing a reject here for some reason.  Using todays's linux-next,
> > > > but there are no changes against net/sctp/stream.c in -next.  The
> > > > assignment to stream->incnt has disappeared.  I did this:
> > > > 
> > > > @@ -535,8 +470,6 @@ int sctp_send_add_streams(struct sctp_as
> > > >  		goto out;
> > > >  	}
> > > >  
> > > > -	stream->outcnt = outcnt;
> > > > -
> > > >  	asoc->strreset_outstanding = !!out + !!in;
> > > >  
> > > >  out:
> > > > 
> > > > 
> > > > We're at 4.20-rc7 and this series is rather large.  I'll merge them all
> > > > to see what happens, but I don't think it's 4.21-rc1 material?
> > > 
> > > Yeah, agreed. Thanks!
> > 
> > Ping? Where did this go?
> > 
> As I recall kent reposted his series convirting flex_arrays to radix trees such
> that it included sctp's uses.

That should be this patchset already.  Or you mean another (re)post,
v2 or so? If yes then I missed it somehow but I still see the
flex_array in v5.0-rc2:

net-next]$ git ls-tree v5.0-rc2 -- lib/flex_array.c
100644 blob 2eed22fa507c7cb0756d7ef643f8a3454eb455ec    lib/flex_array.c

and missing the convertion on sctp stack.

Current patch is the only one I could find with sctp being included:
https://lore.kernel.org/lkml/20181217210021.GA7144@kmo-pixel/T/#re4f8656af37431a376044399681a8771375a4405

> 
> I think xin needs to repost the sctp reallocation patch to make use of those
> radix trees appropriately still (assuming any additional work still needs to be
> done)

This came up on another converstation with him and the lack of this
convertion is blocking him on at least one fix, on one that the fix
using flex_arrays is one and genradix is another.

  Marcelo

> 
> Neil
> 
> >   Marcelo
> >