Re: [PATCH -next RFC 2/6] block: refactor to split bio thoroughly

[Christoph Hellwig]

On Tue, Mar 29, 2022 at 08:35:29AM -0600, Jens Axboe wrote:
> > But more importantly why does your use case even have splits that get
> > submitted together?  Is this a case of Linus' stupidly low default
> > max_sectors when the hardware supports more, or is the hardware limited
> > to a low number of sectors per request?  Or do we hit another reason
> > for the split?
> 
> See the posted use case, it's running 512kb ios on a 128kb device.

That is an awfully low limit these days.  I'm really not sure we should
optimize the block layer for that.