linux-kernel - Re: [PATCHv3 03/19] zram: add lz4 compression backend support

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Date: Fri, 10 May 2024 16:00:10 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Sergey Senozhatsky <senozhatsky@...omium.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>, linux-kernel@...r.kernel.org,
	linux-block@...r.kernel.org
Subject: Re: [PATCHv3 03/19] zram: add lz4 compression backend support

On (24/05/08 16:41), Sergey Senozhatsky wrote:
> +static int lz4_compress(void *ctx, const unsigned char *src,
> +			unsigned char *dst, size_t *dst_len)
> +{
> +	int ret;
> +
> +	ret = LZ4_compress_default(src, dst, PAGE_SIZE, *dst_len, ctx);
> +	if (!ret)
> +		return -EINVAL;
> +	*dst_len = ret;
> +	return 0;
> +}

Apparently lz4 supports compression level tunable, which is
"acceleration". I'll slightly rewrite lz4/lz4hc backends in v4.