Re: zram: Optimize LZ4 dictionary compression performance

[Sergey Senozhatsky]

On (26/03/10 02:54), gao xu wrote:
[..]
> @@ -78,10 +121,16 @@ static int lz4_compress(struct zcomp_params *params, struct zcomp_ctx *ctx,
>  					req->dst_len, params->level,
>  					zctx->mem);
>  	} else {
> +		/* rebuild base_cstream when the dictionary changes */

How often does it change and under what circumstances?

> +		if (!drv->base_c_valid || drv->dict_gen != params->dict_gen) {
> +			ret = lz4_build_base_cstream(params);
> +			if (ret)
> +				return ret;
> +		}