Re: [PATCH v3 5/6] blktrace: break out of blktrace setup on concurrent calls

[Christoph Hellwig]

On Fri, May 01, 2020 at 03:06:26PM +0000, Luis Chamberlain wrote:
> > You have access to a block device here, please use dev_warn() instead
> > here for that, that makes it obvious as to what device a "concurrent
> > blktrace" was attempted for.
> 
> The block device may be empty, one example is for scsi-generic, but I'll
> use buts->name.

Is blktrace on /dev/sg something we intentionally support, or just by
some accident of history?  Given all the pains it causes I'd be tempted
to just remove the support and see if anyone screams.