On Thu, Jan 21, 2021 at 01:48:56PM +0000, liweihang wrote: > On 2021/1/21 21:36, Jason Gunthorpe wrote: > > On Thu, Jan 21, 2021 at 01:33:42PM +0000, liweihang wrote: > > > >> We need to allocate memory while spin_lock is hold, how about using GFP_KERNEL or > >> GFP_NOWAIT? > > > > You should try hard not to do that. Convert he spinlock to a mutex, > > for instance. > > > > Jason > > > > But what if some kernel users call ib_post_send() when holding a spinlock? I doubt extensions like this would be part of kernel verbs.. Does any ULP call ib_post_send under lock? I'm not sure that is valid. Jason
