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authorBarry Song <v-songbaohua@oppo.com>2024-02-22 21:11:34 +1300
committerAndrew Morton <akpm@linux-foundation.org>2024-03-13 12:12:21 -0700
commit6c303f1af356f5f6847146ab0199dc3fe61d8f46 (patch)
treec1d655bcb8527c6924e1113bcf3461c955a9063f /include/crypto/acompress.h
parent82634d7e24271698e50a3ec811e5f50de790a65f (diff)
crypto: introduce: acomp_is_async to expose if comp drivers might sleep
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. Link: https://lkml.kernel.org/r/20240222081135.173040-2-21cnbao@gmail.com Signed-off-by: Barry Song <v-songbaohua@oppo.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Chris Li <chrisl@kernel.org> Cc: Chengming Zhou <zhouchengming@bytedance.com> Cc: Dan Streetman <ddstreet@ieee.org> Cc: David S. Miller <davem@davemloft.net> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Seth Jennings <sjenning@redhat.com> Cc: Vitaly Wool <vitaly.wool@konsulko.com> Cc: Yosry Ahmed <yosryahmed@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/crypto/acompress.h')
-rw-r--r--include/crypto/acompress.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/crypto/acompress.h b/include/crypto/acompress.h
index 574cffc90730..80e243611fe2 100644
--- a/include/crypto/acompress.h
+++ b/include/crypto/acompress.h
@@ -160,6 +160,12 @@ static inline void acomp_request_set_tfm(struct acomp_req *req,
req->base.tfm = crypto_acomp_tfm(tfm);
}
+static inline bool acomp_is_async(struct crypto_acomp *tfm)
+{
+ return crypto_comp_alg_common(tfm)->base.cra_flags &
+ CRYPTO_ALG_ASYNC;
+}
+
static inline struct crypto_acomp *crypto_acomp_reqtfm(struct acomp_req *req)
{
return __crypto_acomp_tfm(req->base.tfm);