On 3/29/22 8:40 AM, Christoph Hellwig wrote: > 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. That's exactly what my replies have been saying. I don't think this is a relevant thing to optimize for. Fixing fairness for wakeups seems useful, however. -- Jens Axboe
