On Mon, 2 Jul 2018 13:51:59 +0800 Waiman Long <longman@xxxxxxxxxx> wrote: > The negative dentry tracking is made a configurable option so that > users who don't care about negative dentry tracking will have the > option to disable it. The new config option DCACHE_TRACK_NEG_ENTRY > is disabled by default. > > If this option is enabled, a new kernel parameter "neg_dentry_pc=<%>" > allows users to set the soft limit on how many negative dentries are > allowed as a percentage of the total system memory. The default is 2% > and this new parameter accept a range of 0-10% where 0% means there > is no limit. > > When the soft limit is reached, a warning message will be printed to > the console to alert the system administrator. It would be much more convenient if this was tunable at runtime via yet another /proc knob. Is there any particular reason why we can't do this?
