Messages in this thread | | | Date | Tue, 26 Nov 2019 17:54:20 +0100 | From | Michal Hocko <> | Subject | Re: SLUB: purpose of sysfs events on cache creation/removal |
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On Tue 26-11-19 16:32:56, Cristopher Lameter wrote: > On Tue, 26 Nov 2019, Michal Hocko wrote: > > > Hi, > > I have just learnt about KOBJ_{ADD,REMOVE} sysfs events triggered on > > kmem cache creation/removal when SLUB is configured. This functionality > > goes all the way down to initial SLUB merge. I do not see any references > > in the Documentation explaining what those events are used for and > > whether there are any real users. > > > > Could you shed some more light into this? > > I have no idea about what this is.
It seems to be there since the initial merge. I suspect this is just following a generic sysfs rule that each file has to provide those events?
> There have been many people who > reworked the sysfs support and this has been the cause for a lot of > breakage over the years.
Remember any specifics?
I am mostly interested in potential users. In other words I am thinking to suppress those events. There is already ke knob to control existence of memcg caches but I do not see anything like this for root caches. -- Michal Hocko SUSE Labs
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