From nobody Wed Dec 17 10:50:56 2025 Received: from mail-oa1-f41.google.com (mail-oa1-f41.google.com [209.85.160.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F3B8A134409 for ; Fri, 12 Jul 2024 05:19:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720761578; cv=none; b=OO219VPBFiCiTH5ERmzfVRuhdyi3p3qaFrmtz6Jdkxk7AUG38EBKc0Bv9iKehZhRqeuzx5ELc6eMzuyNUsP9iS1nnxmC9IrZ3Qz5xm6bHDHJrx9KIvyfdnui7z0SeNHEUoT888NCc6GcW15LBN7+D7L9gXUY8JhmnW2mK7X4W+s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720761578; c=relaxed/simple; bh=GATKpyXWE8hTvPDzPhCl+JMRpVE3IZhLa5/tLsowPmw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TfGW/j/a41uh/eaL6+H3UTfovscCmZSV7etMbzbeDpVYmNgoa0mt9vKsS2svqw/prlvV0pv1GL0LTtf7kLIEgsGDPl2Gswbm2gJ0/Pe+mYRZK0wt4s95mhfyB6b0Xc8CybwVKqvgKTZWLGzkZC984oP0W+EE5DOKJR6vfa4bUFs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=b5lGTDOg; arc=none smtp.client-ip=209.85.160.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="b5lGTDOg" Received: by mail-oa1-f41.google.com with SMTP id 586e51a60fabf-25e0c0df558so767373fac.0 for ; Thu, 11 Jul 2024 22:19:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1720761576; x=1721366376; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=lkvMhO5tJBHwbauNuFvcStMN53VUkERyuHIOYpstgkw=; b=b5lGTDOgF6jUV/Ca7krXdoiOYiLmhpg/y4NI82TCEU84O1eqfGoLA6QEg5JNvoEIxA EgNbwPQvNun6OLsUU6rHKSR93Oo+78ZTtAMdYWk9PedSuv8HjU3Ic3QP4Mh+TQ+qQJnm rLBciWe1yWTRWkHgYbSl5TmIak+AIDL8TwFp0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720761576; x=1721366376; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=lkvMhO5tJBHwbauNuFvcStMN53VUkERyuHIOYpstgkw=; b=cuck2/fw/ASJv4JIKOrZIMhxbQVHvh9CNmc0oB+TGRl2Nrv+m/YOXmNmqF5paUW4LT 7B8UF5hQOaakJqRYkBznAwzhH4PlSJpzIMMckVeX4KjAM07iE04GvrEE4gYy0O3ZwXzD ExQBPP9iQVpvxTkCjyG8aUEVbvYBkRMcOkNxRtk7zKrsGA/IygDMM51FSvGh+Wu8KVKw pRMYpYglXX5PiqLD5vodihl/aOteDdWh8HlY1DmSSaIuUumka2RKtKAD8nt+6Tv2QJVX gDUFopBHKOIQkqq1/af1OqvAM9Lov0+v8+K1bDdz004awY/15gNYvpO1OANTXX8kpu7B l7sA== X-Gm-Message-State: AOJu0YzDj2ke2WhxqZ3Ri0OxeRxaAO+Lb04iPgPaiCvDLbgl8XyUsdnW A08/89+An5m1isGLpbOpkD7N5Q/WPvokaTxXRRj7d/qqnRvgeXJDWDxn9wSLYw== X-Google-Smtp-Source: AGHT+IFTTgm3AyRTARBBsl0DcUihLcIW7vRNEyk9m0iGo73r6yB5FIqA+GRyeXo1Z/O0RWe1vSGluA== X-Received: by 2002:a05:6870:c1d3:b0:258:44b7:b842 with SMTP id 586e51a60fabf-25eae7b8802mr9626375fac.13.1720761576076; Thu, 11 Jul 2024 22:19:36 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:15f3:5252:ec56:52ae]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-70b43967851sm6553436b3a.109.2024.07.11.22.19.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Jul 2024 22:19:35 -0700 (PDT) From: Sergey Senozhatsky To: Andrew Morton , Minchan Kim Cc: linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: [PATCH v6 14/23] zram: recalculate zstd compression params once Date: Fri, 12 Jul 2024 14:18:25 +0900 Message-ID: <20240712051850.484318-15-senozhatsky@chromium.org> X-Mailer: git-send-email 2.45.2.993.g49e7a77208-goog In-Reply-To: <20240712051850.484318-1-senozhatsky@chromium.org> References: <20240712051850.484318-1-senozhatsky@chromium.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" zstd compression params depends on level, but are constant for a given instance of zstd compression backend. Calculate once (during ctx creation). Signed-off-by: Sergey Senozhatsky --- drivers/block/zram/backend_zstd.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/block/zram/backend_zstd.c b/drivers/block/zram/backend= _zstd.c index c356c5e6e503..7c6798f0c912 100644 --- a/drivers/block/zram/backend_zstd.c +++ b/drivers/block/zram/backend_zstd.c @@ -10,6 +10,7 @@ struct zstd_ctx { zstd_cctx *cctx; zstd_dctx *dctx; + zstd_parameters cprm; void *cctx_mem; void *dctx_mem; s32 level; @@ -40,6 +41,7 @@ static void *zstd_create(struct zcomp_params *params) ctx->level =3D zstd_default_clevel(); =20 prm =3D zstd_get_params(ctx->level, PAGE_SIZE); + ctx->cprm =3D zstd_get_params(ctx->level, PAGE_SIZE); sz =3D zstd_cctx_workspace_bound(&prm.cParams); ctx->cctx_mem =3D vzalloc(sz); if (!ctx->cctx_mem) @@ -69,11 +71,10 @@ static int zstd_compress(void *ctx, const unsigned char= *src, size_t src_len, unsigned char *dst, size_t *dst_len) { struct zstd_ctx *zctx =3D ctx; - const zstd_parameters prm =3D zstd_get_params(zctx->level, PAGE_SIZE); size_t ret; =20 ret =3D zstd_compress_cctx(zctx->cctx, dst, *dst_len, - src, src_len, &prm); + src, src_len, &zctx->cprm); if (zstd_is_error(ret)) return -EINVAL; *dst_len =3D ret; --=20 2.45.2.993.g49e7a77208-goog