Re: [Qemu-devel] [RFC v3] translate-all: protect code_gen_buffer with RCU

[Paolo Bonzini]

On 30/04/2016 05:40, Emilio G. Cota wrote:
>> The tb_flush
>> > is a fairly rare occurrence its not like its on the critical performance
>> > path (although of course pathological cases are possible).
> This is what I thought from the beginning, but wanted to give this
> alternative a go anyway to see if it was feasible.
> 
> On my end I won't do any more work on this approach. Will go back
> to locks, despite Paolo's (justified) dislike for them =)

Which locks?  tb_lock during tb_find_fast?  The problem with that was
that it slowed down everything a lot, wasn't it?

To me, the RCU idea is not really about making tb_flush (the rare case)
faster; it was more about keeping the rest simple and fast.

Paolo