From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=113.46.200.224 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793155454; b=y3MUA7GfBETQU5SZcRcgTRyvkAc8hzI71zDLkgxDb7GVt4Bg85QevwzdDoEaIZpI0ivi 2C4iqNW06NXirh3u3MJ7ePXiVW+7U3n9whhCdumldC9E3yEPZbWo5jc+4YcLcrVCyU9Q9 DNO6gNjiHk4MvJgcbiRM2UuTWd1+pwW+sDv6XZZlfqf1RpdsFh6FYB1CRm7Je3uJZSMuv nsCN5VqnkuFvDnA6Tw1gzfI3XpI4GyGtrtycpwuce7qLdljvlzkJ4iLGbI4rTKP8Gwf5Z Dr/9yaaUJKttxjHl7jXwAyn57TbFYOJ2LIhAJTjOsKhZBfuTdWQdnH3yvk3QpT3CYUg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793155454; h=DMARC-Filter:dkim-signature:Received:Received:Received:From:To:CC: Subject:Date:Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding:Content-Type:X-Originating-IP: X-ClientProxiedBy; bh=oo/01Jp9FjfS/2vPevSBVo3jb7P52PPUK77gNUPhv1Q=; b=eo835LqJkC6m3FQp//gQSdmeoNmmrhWb4cwV4M5kTXcCIVtQODfBj4ohpcOyWcPMcoZY jOnbABm68dCEEdxc8tYab3Wl+MsXO2Pckh51MJtlxhThCaeQ8kRNEBETALF2NKKP966Ip DysLpb6FI4n8XfRp9yVSZrQPDFZdO52mV261JGuN44+fB7syeY7e0+e63DUKie990pezl YpqiEkmnEmN/hPZL/TSYMDm+Fdi+c318YG96dmKjou8+77ojp/AJNuUp3NUyqS8s8BS7V F09ilIRwLk8uUy0TK/gTiYGmmHH6GjRQ4IczF7DbEC6d5aJIZ6vOWJgI+Jqtv67t2tA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; dkim=pass header.d=huawei.com header.i=@huawei.com header.a=rsa-sha256 header.s=dkim header.b=0ya6vdEb; arc=none smtp.remote-ip=113.46.200.224 Received: from canpmsgout09.his.huawei.com (canpmsgout09.his.huawei.com [113.46.200.224]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93861606A31E; Wed, 28 Oct 2026 02:44:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 93861606A31E Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=huawei.com header.i=@huawei.com header.a=rsa-sha256 header.s=dkim header.b=0ya6vdEb dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=oo/01Jp9FjfS/2vPevSBVo3jb7P52PPUK77gNUPhv1Q=; b=0ya6vdEbU5Mfqn1RFJsUVc/88GAzKW+T/UBkDTmNWfJgQMH59agRyxVZ/B5GgYIouxxqL34nX ENUgBMJZecIpIWCm2y0m+Ybkgmxt7UvaBglR10oSURNSmBD9j1FyTesjKhpX6FGSWa3GyFVks2T 0aAqqT2OD2zbiBGNYLNk1hs= Received: from mail.maildlp.com (unknown [172.19.163.214]) by canpmsgout09.his.huawei.com (SkyGuard) with ESMTPS id 4jDsBV60Xtz1cyqv; Wed, 28 Oct 2026 10:44:02 +0800 (CST) Received: from kwepemk200008.china.huawei.com (unknown [7.202.194.74]) by mail.maildlp.com (Postfix) with ESMTPS id 688134057C; Wed, 28 Oct 2026 10:44:09 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemk200008.china.huawei.com (7.202.194.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Wed, 28 Oct 2026 10:44:08 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , CC: Subject: [PATCH 1/2] docs: kernel-parameters: Drop unsupported preempt= modes Date: Wed, 28 Oct 2026 10:43:32 +0800 Message-ID: <20261028024333.795917-2-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261028024333.795917-1-ruanjinjie@huawei.com> References: <20261028024333.795917-1-ruanjinjie@huawei.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: kwepems500002.china.huawei.com (7.221.188.17) To kwepemk200008.china.huawei.com (7.202.194.74) Since commit d3d16750693b ("sched: dynamic: Make PREEMPT_DYNAMIC depend on ARCH_HAS_PREEMPT_LAZY") only "full" and "lazy" are accepted with CONFIG_PREEMPT_DYNAMIC: every architecture that supports it selects ARCH_HAS_PREEMPT_LAZY, which excludes the none and voluntary models. Passing either is rejected with "Dynamic Preempt: unsupported mode". Remove the two lines so the parameter reference matches the code. Signed-off-by: Jinjie Ruan --- Documentation/admin-guide/kernel-parameters.txt | 2 -- 1 file changed, 2 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index fce0d52b9cfe..11f0b700d56a 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5428,8 +5428,6 @@ Kernel parameters preempt= [KNL] Select preemption mode if you have CONFIG_PREEMPT_DYNAMIC - none - Limited to cond_resched() calls - voluntary - Limited to cond_resched() and might_sleep() calls full - Any section that isn't explicitly preempt disabled can be preempted anytime. Tasks will also yield contended spinlocks (if the critical section isn't -- 2.34.1