On Wed, 4 Sep 2024 18:08:05 -0700 Davidlohr Bueso <dave@xxxxxxxxxxxx> wrote: > On Wed, 04 Sep 2024, Andrew Morton wrote:\n > >On Wed, 4 Sep 2024 09:27:40 -0700 Davidlohr Bueso <dave@xxxxxxxxxxxx> wrote: > > > >> This adds support for allowing proactive reclaim in general on a > >> NUMA system. A per-node interface extends support for beyond a > >> memcg-specific interface, respecting the current semantics of > >> memory.reclaim: respecting aging LRU and not supporting > >> artificially triggering eviction on nodes belonging to non-bottom > >> tiers. > >> > >> This patch allows userspace to do: > >> > >> echo 512M swappiness=10 > /sys/devices/system/node/nodeX/reclaim > > > >One value per sysfs file is a rule. > > I wasn't aware of it as a rule - is this documented somewhere? Documentation/filesystems/sysfs.rst, line 62. Also lots of gregkh grumpygrams :) > I ask because I see some others are using space-separated parameters, ie: > > /sys/bus/usb/drivers/foo/new_id > > ... or colons. What would be acceptable? echo "512M:10" > ... ? Kinda cheating. But the rule gets violated a lot.
