From: Sergey Senozhatsky <senozhatsky@chromium.org>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>
Subject: Re: [PATCH 1/3] crypto: scomp - Add setparam interface
Date: Mon, 3 Jun 2024 17:28:56 +0900 [thread overview]
Message-ID: <20240603082856.GJ8400@google.com> (raw)
In-Reply-To: <20240603023447.GI8400@google.com>
On (24/06/03 11:34), Sergey Senozhatsky wrote:
> On (24/06/01 11:54), Herbert Xu wrote:
> > On Sat, Jun 01, 2024 at 09:24:15AM +0900, Sergey Senozhatsky wrote:
> > >
> > > Is it possible to share a tfm? I thought that tfm-s carry some state
> > > (compression workmem/scratch buffer) so one cannot do parallel compressions
> > > on different CPUs using the same tfm.
> >
> > Yes the tfm can be shared. The data state is kept in the request
> > object.
>
> Oh, nice, thanks.
Herbert, I'm not sure I see how tfm sharing is working.
crypto_tfm carries a pointer to __crt_ctx, which e.g. for zstd
is struct zstd_ctx, where it keeps all the state (zstd_cctx, zstd_dctx,
and compression/decompression workmem buffers).
When we call crypto_comp_compress()->zstd_compress() we just pass tfm,
then the driver gets tfm-s state/ctx via crypto_tfm_ctx() and uses it
for underlying compression library call.
next prev parent reply other threads:[~2024-06-03 8:29 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-20 11:04 [PATCH 0/3] crypto: acomp - Add interface to set parameters Herbert Xu
2024-05-20 11:04 ` [PATCH 1/3] crypto: scomp - Add setparam interface Herbert Xu
2024-05-31 5:47 ` Sergey Senozhatsky
2024-05-31 6:34 ` Sergey Senozhatsky
2024-05-31 8:29 ` Herbert Xu
2024-06-01 0:24 ` Sergey Senozhatsky
2024-06-01 3:54 ` Herbert Xu
2024-06-03 2:34 ` Sergey Senozhatsky
2024-06-03 8:28 ` Sergey Senozhatsky [this message]
2024-06-03 8:34 ` Herbert Xu
2024-06-04 5:09 ` Sergey Senozhatsky
2024-06-04 8:48 ` Herbert Xu
2024-05-31 8:30 ` Herbert Xu
2024-05-20 11:04 ` [PATCH 2/3] crypto: acomp " Herbert Xu
2025-05-06 16:01 ` Cabiddu, Giovanni
2025-05-07 2:20 ` Herbert Xu
2025-05-07 13:16 ` Cabiddu, Giovanni
2025-05-08 5:01 ` Sergey Senozhatsky
2025-05-07 17:16 ` Eric Biggers
2025-05-08 5:42 ` Sergey Senozhatsky
2025-05-08 19:21 ` Kanchana P Sridhar
2024-05-20 11:04 ` [PATCH 3/3] crypto: acomp - Add comp_params helpers Herbert Xu
2024-05-31 5:49 ` Sergey Senozhatsky
2024-05-31 8:32 ` Herbert Xu
2024-05-31 5:07 ` [PATCH 0/3] crypto: acomp - Add interface to set parameters Herbert Xu
2024-05-31 5:12 ` Sergey Senozhatsky
2024-05-31 5:18 ` Sergey Senozhatsky
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