From nobody Sun Feb 8 21:46:30 2026 Received: from out-171.mta0.migadu.com (out-171.mta0.migadu.com [91.218.175.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A28E19C566 for ; Fri, 6 Feb 2026 05:45:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770356726; cv=none; b=hOO0RN66e8LXZLFdVE6npnUID4gqgDmaVauA0GLDeRidhzzREyEVDXgI80APIxBOBOrIho9yxg2I16YRMcJ8VKow4pm5S6dZJtya9ErPTBUWO4ubyBK/n0RKjb11l+A4iiu6t0oXSTSEjYt3UhHDye+7+kv4/bzGSqo4ncPN80M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770356726; c=relaxed/simple; bh=Ap3qa1jwZ/ZxW6QwlbGPqrxHr2onbsd9Oz52eJgcfu4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XAgOZn7Q8xcf/enF3/XUXx0Q7Fi//ZSLmEHxGpiZKNyBgBwjT6nyAymHG1VX3bl5b+edKzX8lhswAtFAqWCtd1upzNPXkMjll1iRt0XiicZOj57qhRmkk7rYQE01fg/16j9IAPuoHJtG7+ZoOSqqVq0AgdsvU2mXXb24J9/D030= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=vIeJp8ak; arc=none smtp.client-ip=91.218.175.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="vIeJp8ak" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1770356724; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=IB/st4mc4P63PYLlKiqeZrA2geP6YL8CceuAdktt8VU=; b=vIeJp8akbofV39yp7u4UmR1mUQwduHUb9rJ7HJnBfpB3cFB7K95o1PqCqjqV50+x0qnnp4 ggzdLZf9vR0BwJw7tMYXzhIr+mKTUDrPulBY6tBPT4YwhqMNEE6VClatmBJJDRwfxC+QCD 9K1Zsm7/bRiiWIyMTKK24k+uCKWBGaU= From: sunliming@linux.dev To: song@kernel.org, yukuai@fnnas.com Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, linan666@huaweicloud.com, sunliming Subject: [PATCH v2 2/3] lib/raid6: Optimizing the raid6_select_algo time through asynchronous processing Date: Fri, 6 Feb 2026 13:43:40 +0800 Message-Id: <20260206054341.106878-3-sunliming@linux.dev> In-Reply-To: <20260206054341.106878-1-sunliming@linux.dev> References: <20260206054341.106878-1-sunliming@linux.dev> 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 X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" From: sunliming Optimizing the raid6_select_algo time. In raid6_select_algo(), an raid6 gen algorithm is first selected quickly through synchronous processing, while the time-consuming process of selecting the optimal algorithm via benchmark= ing is handled asynchronously. This approach speeds up the overall startup time and ultimately ensures the selection of an optimal algorithm. Signed-off-by: sunliming --- lib/raid6/algos.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c index a14469388b0c..a3c94641a8e5 100644 --- a/lib/raid6/algos.c +++ b/lib/raid6/algos.c @@ -12,6 +12,7 @@ */ =20 #include +#include #ifndef __KERNEL__ #include #include @@ -166,7 +167,7 @@ static inline int raid6_choose_gen_fast(void) =20 if (best) { raid6_call =3D *best; - pr_info("raid6: skipped pq benchmark and selected %s\n", + pr_info("raid6: fast selected %s, async benchmark pending\n", best->name); } else { pr_err("raid6: No valid algorithm found even for fast selection!\n"); @@ -213,7 +214,7 @@ static inline const struct raid6_calls *raid6_gen_bench= mark( } =20 if (!best) { - pr_err("raid6: Yikes! No algorithm found!\n"); + pr_warn("raid6: async benchmark failed to find any algorithm\n"); goto out; } =20 @@ -286,24 +287,33 @@ static int raid6_choose_gen_benmark(void) return ret; } =20 +static struct work_struct raid6_benchmark_work __initdata; + +static __init void benchmark_work_func(struct work_struct *work) +{ + raid6_choose_gen_benmark(); +} + int __init raid6_select_algo(void) { int ret =3D 0; const struct raid6_recov_calls *rec_best =3D NULL; =20 - /* select raid gen_syndrome functions */ - if (!IS_ENABLED(CONFIG_RAID6_PQ_BENCHMARK)) - ret =3D raid6_choose_gen_fast(); - else - ret =3D raid6_choose_gen_benmark(); - + /* phase 1: synchronous fast selection generation algorithm */ + ret =3D raid6_choose_gen_fast(); if (ret < 0) goto out; =20 /* select raid recover functions */ rec_best =3D raid6_choose_recov(); - if (!rec_best) + if (!rec_best) { ret =3D -EINVAL; + goto out; + } + + /* phase 2: asynchronous performance benchmarking */ + INIT_WORK(&raid6_benchmark_work, benchmark_work_func); + schedule_work(&raid6_benchmark_work); =20 out: return ret; @@ -311,7 +321,7 @@ int __init raid6_select_algo(void) =20 static void raid6_exit(void) { - do { } while (0); + cancel_work_sync(&raid6_benchmark_work); } =20 subsys_initcall(raid6_select_algo); --=20 2.25.1