Re: [Qemu-devel] Status of my hacks on the MTTCG WIP branch

[Paolo Bonzini]

On 15/01/2016 15:49, KONRAD Frederic wrote:
> 
>        /* Move the TB to the head of the list */
> -    *ptb1 = tb->phys_hash_next;
> -    tb->phys_hash_next = tcg_ctx.tb_ctx.tb_phys_hash[h];
> -    tcg_ctx.tb_ctx.tb_phys_hash[h] = tb;
> +//    *ptb1 = tb->phys_hash_next;
> +//    tb->phys_hash_next = tcg_ctx.tb_ctx.tb_phys_hash[h];
> +//    tcg_ctx.tb_ctx.tb_phys_hash[h] = tb;

This is the right fix.  It's a *huge* performance hit to take the
tb_lock around tb_find_fast.

Paolo