Messages in this thread | | | Date | Tue, 6 Mar 2012 23:12:12 +0800 | Subject | Re: [RFC PATCH 5/6] implement per-cpu&per-domain state machine call_srcu() | From | Lai Jiangshan <> |
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On Tue, Mar 6, 2012 at 7:16 PM, Peter Zijlstra <peterz@infradead.org> wrote: > On Tue, 2012-03-06 at 17:57 +0800, Lai Jiangshan wrote: >> srcu_head is bigger, it is worth, it provides more ability and simplify >> the srcu code. > > Dubious claim.. memory footprint of various data structures is deemed > important. rcu_head is 16 bytes, srcu_head is 32 bytes. I think it would > be real nice not to have two different callback structures and not grow > them as large.
CC: tj@kernel.org It could be better if workqueue also supports 2*sizeof(long) work callbacks.
I prefer ability/functionality a little more, it eases the caller's pain. preemptible callbacks also eases the pressure of the whole system. But I'm also ok if we limit the srcu-callbacks in softirq.
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