On Thu, Jun 29, 2023 at 07:03:56PM +0800, chengming.zhou@xxxxxxxxx wrote: > From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx> > > If request need to be completed remotely, we insert it into percpu llist, > and smp_call_function_single_async() if llist is empty previously. > > We don't need to use per-rq csd, percpu csd is enough. And the size of > struct request is decreased by 24 bytes. > > This way is cleaner, and looks correct, given block softirq is guaranteed to be > scheduled to consume the list if one new request is added to this percpu list, > either smp_call_function_single_async() returns -EBUSY or 0. > > Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx> > --- > v2: > - Change to use call_single_data_t, which avoid to use 2 cache lines > for 1 csd, as suggested by Ming Lei. > - Improve the commit log, the explanation is copied from Ming Lei. Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx> Thanks, Ming
