On Fri, Dec 17, 2021 at 1:30 AM Mariusz Tkaczyk <mariusz.tkaczyk@xxxxxxxxxxxxxxx> wrote: > > As suggested by Neil Brown[1], this limitation seems to be > deprecated. > > With plugging in use, writes are processed behind the raid thread > and conf->pending_count is not increased. This limitation occurs only > if caller doesn't use plugs. > > It can be avoided and often it is (with plugging). There are no reports > that queue is growing to enormous size so remove queue limitation for > non-plugged IOs too. > > [1] https://lore.kernel.org/linux-raid/162496301481.7211.18031090130574610495@xxxxxxxxxxxxxxxxxxxxx > > Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@xxxxxxxxxxxxxxx> I applied this patch to md-next, cecause it helps simplify Vishal's patches for REQ_NOWAIT. However, I think this change is not complete, as we can now remove pending_count from r1conf and r10conf. Please send patch on top of md-next to clean up pending_count. Thanks, Song
