Re: [PATCH v1 0/8] Batched zswap_store() with compression batching

[Herbert Xu <herbert@gondor.apana.org.au>]

On Thu, Oct 15, 2026 at 08:32:21PM -0700, Kanchana P. Sridhar wrote:
>
> If you are Ok with all this, we will need Herbert's Ok for this change
> in patch 3:
> 
> diff --git a/crypto/acompress.c b/crypto/acompress.c
> index 192ea996e779..db8e4c82b900 100644
> --- a/crypto/acompress.c
> +++ b/crypto/acompress.c
> @@ -293,8 +293,12 @@ int crypto_acomp_compress(struct acomp_req *req)
>                 return -EAGAIN;
> 
>         if (likely(req->unit_size && acomp_request_issg(req))) {
> -               if (!crypto_acomp_req_seg(tfm))
> -                       return acomp_do_req_chain(req, true);
> +               if (likely(!crypto_acomp_req_seg(tfm))) {
> +                       int err = tfm->compress(req);
> +
> +                       req->dst->length = unlikely(err) ? err : req->dlen;
> +                       return err;
> +               }

What if you put this short-circuit into acomp_do_req_chain instead,
does it still give you the same performance boost?

Cheers,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt