Messages in this thread | | | Date | Thu, 24 Jan 2013 18:09:43 -0800 | From | Tejun Heo <> | Subject | Re: [PATCH 23/32] Generic dynamic per cpu refcounting |
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Hello, again.
On Thu, Jan 24, 2013 at 06:03:40PM -0800, Tejun Heo wrote: > Yeah, if we're aiming to replace refcnts in file and kobj, dynamic > alloc may be justified. Hopefully, the accounting necessary to decide > whethre to use percpu isn't too burdensome.
Ooh, I forgot one thing. We might not gain much by replacing file refcnt w/ this. You can't really get cheaper than fget_light(). Also, while kobj destruction can still be considered an infrequent operation, file destruction is not and people will get mighty unhappy if you do synchronize_sched/rcu() from fput() synchronously.
So, I'm now back to "do we need dynamic allocation". What else do we have to convert?
Thanks.
-- tejun
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