kmem_cache_create reclaim callback?

[Venkatesh Srinivas <me@xxxxxxxxxxx>]

Hi,

In Solaris, kmem_cache_create accepts a 'reclaim' callback, to be called
under memory pressure; as far as I can see, Linux's allocator doesn't
appear to have similar functionality.

I'd imagine this functionality would be useful for subsystems that hold
caches or other resources that can be dropped safely under pressure.

Is there any reason why Linux doesn't have this callback? Would this be
something reasonable for a newbie to work on adding?

Thanks,
--vs

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