> From: Jason Gunthorpe <jgg@xxxxxxxxxx> > Sent: Friday, October 15, 2021 7:18 PM > > On Fri, Oct 15, 2021 at 09:18:06AM +0000, Liu, Yi L wrote: > > > > Acquire from the xarray is > > > rcu_lock() > > > ioas = xa_load() > > > if (ioas) > > > if (down_read_trylock(&ioas->destroying_lock)) > > > > all good suggestions, will refine accordingly. Here destroying_lock is a > > rw_semaphore. right? Since down_read_trylock() accepts a rwsem. > > Yes, you probably need a sleeping lock got it. thanks, Regards, Yi Liu
