On Sat, Mar 14, 2020 at 03:44:49AM +0000, liweihang wrote: > On 2020/3/13 20:18, Jason Gunthorpe wrote: > > On Fri, Mar 13, 2020 at 06:02:20AM +0000, liweihang wrote: > >> On 2020/3/13 1:27, Jason Gunthorpe wrote: > >>> On Thu, Mar 12, 2020 at 01:04:05PM -0400, Andrew Boyer wrote: > >>>> What would you say to a per-process env variable to disable locking in > >>>> a userspace provider? > >>> > >>> That is also a no. verbs now has 'thread domain' who's purpose is to > >>> allow data plane locks to be skipped. > >>> > >>> Generally new env vars in verbs are going to face opposition from > >>> me. > >>> > >>> Jason > >> > >> Thanks for your comments. Do you have some suggestions on how to > >> achieve lockless flows in kernel? Are there any similar interfaces > >> in kernel like the thread domain in userspace? > > > > It has never come up before > > > > Jason > > > > Thank you, Jason. Could you please explain why it's not encouraged to > use module parameters in kernel? Behavior that effects the operation of a ULP should never be configured globally. The ULP must self-select this behavior pragmatically, only when it is safe. Jason
