Subject: Re: [PATCH v2 0/2] net/sctp: Avoid allocating high order memory with kmalloc()

From: Marcelo Ricardo Leitner <[email-masked]>
Date: Fri, 3 Aug 2018 17:30:09 -0300

On Fri, Aug 03, 2018 at 04:43:28PM +0000, David Laight wrote:
> From: Konstantin Khorenko
> > Sent: 03 August 2018 17:21
> > 
> > Each SCTP association can have up to 65535 input and output streams.
> > For each stream type an array of sctp_stream_in or sctp_stream_out
> > structures is allocated using kmalloc_array() function. This function
> > allocates physically contiguous memory regions, so this can lead
> > to allocation of memory regions of very high order, i.e.:
> ...
> 
> Given how useless SCTP streams are, does anything actually use
> more than about 4?

Maybe Michael can help us with that. I'm also curious now.

  Marcelo