Re: [PATCH v5 1/3] crypto: introduce: acomp_is_async to expose if comp drivers might sleep

[Herbert Xu]

On Tue, Feb 20, 2024 at 07:44:12PM +1300, Barry Song wrote:
> From: Barry Song <v-songbaohua@xxxxxxxx>
> 
> acomp's users might want to know if acomp is really async to
> optimize themselves. One typical user which can benefit from
> exposed async stat is zswap.
> 
> In zswap, zsmalloc is the most commonly used allocator for
> (and perhaps the only one). For zsmalloc, we cannot sleep
> while we map the compressed memory, so we copy it to a
> temporary buffer. By knowing the alg won't sleep can help
> zswap to avoid the need for a buffer. This shows noticeable
> improvement in load/store latency of zswap.
> 
> Signed-off-by: Barry Song <v-songbaohua@xxxxxxxx>
> ---
>  include/crypto/acompress.h | 6 ++++++
>  1 file changed, 6 insertions(+)

Acked-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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