On Fri, Apr 11, 2025 at 04:16:08PM +0200, Christian Brauner wrote: > On Thu, Apr 10, 2025 at 07:21:17PM +0800, lirongqing wrote: > > From: Li RongQing <lirongqing@xxxxxxxxx> > > > > Make file-nr output the total allocated file handles, not per-cpu > > cache number, it's more precise, and not in hot path > > > > Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx> > > --- > > That means grabbing a lock suddenly. Is there an actual use-case > behind this? > The centralized value can be really grossly inaccurate as CPU count increases. There is some talks about fixing that, see: https://lore.kernel.org/linux-mm/20250410175149.1206995-1-mathieu.desnoyers@xxxxxxxxxxxx/ In the meantime, given that this is only accessed when reading the /proc file, this should be fine? Note it still wont delay bumps/decs as long as they fit the batch (which is the common case).
