From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 8A722606A8A8 for ; Thu, 12 Nov 2026 13:30:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=U7K3XgNT; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=gPVSqwts DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=TIJ/B4xCXlnMR973pp/iagBmP0zyby+RS+bYxCX6O/A=; b=U7K3XgNT9WHN7zql436hxISEmd ZOiZBCfkw3GpbcjqAxxVrbOzxzEokK4PPNqdG3RjDhXJSwLC+yQ0FwT19Pb8MoDIgmrdqqnaUrK/B KBXwEefmIm2N4nLtFHY8IdtkCrmvOpUrOUj+O3MVX6m25Tw17Wl0cm4b6Ebr4dNu8Fxs47KAaHR+d a6YHO50yh9S7TdHZu4oCsJHU/Ug+n5S6MOHrMACp3ts7J2O/Jt/BVvuJk7f2R2SFTChk41cnL//v6 /7l/osE2lf7V/oJHKEJAwGc084VEsmlrNawRLtbvvCdPsIyjNCpiMOurRCO9WragzEwXcNrPSGzKl IKucP7lA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRUt4-0000000A4bP-3hfT; Thu, 12 Nov 2026 13:30:46 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRUt3-0000000A4bF-25Qk for kexec@lists.infradead.org; Thu, 12 Nov 2026 13:30:45 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 09BE441332; Thu, 12 Nov 2026 13:30:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4EA581F00A06; Thu, 12 Nov 2026 13:30:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794490244; bh=TIJ/B4xCXlnMR973pp/iagBmP0zyby+RS+bYxCX6O/A=; h=From:To:Cc:Subject:In-Reply-To:References:Date; b=gPVSqwtsS4+iVC1025PcArimiK7ZsHRGSfLl/9vWj0OFRDu3FHfI2SLPjoziXSFGd tCksDvCxQdG6NdNpsUcKUfbfZFW61q1znvRx0Qpmku3wmIYklPB4XX6DhKQYXGaKsu Xbu8aacc3lRj6gAcSN/lrVVf01PuoNk5mZjnlcQJFKlFMAcHSyCTa73yoMurgPflNC +UAz8LhHJ0LNk3h5Bm4EgtdH5kI6Vqv03I2ajqOCLPe4CMU3GGMoZS/guUm46MlYOd hXbG+m9rvuttdDpzt4Bx5O6QJ2qbbqx/z/Rw2dFI2uULXT/u3EvIyRvFjV0WfHh5Rq hE44LMljP4V9g== From: Pratyush Yadav To: "Mike Rapoport (Microsoft)" Cc: Jonathan Corbet , Pasha Tatashin , Pratyush Yadav , Alexander Graf , Andrew Morton , Chen Pei , George Guo , Kexin Liu , Randy Dunlap , Shuah Khan , Sourabh Jain , kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v3 1/5] kho: reject zero bootmem scale In-Reply-To: <20261112-kho-bootmem-sizing-v3-1-f0c8d00295d5@kernel.org> (Mike Rapoport's message of "Thu, 12 Nov 2026 12:38:53 +0200") References: <20261112-kho-bootmem-sizing-v3-0-f0c8d00295d5@kernel.org> <20261112-kho-bootmem-sizing-v3-1-f0c8d00295d5@kernel.org> Date: Thu, 12 Nov 2026 14:30:40 +0100 Message-ID: <2vxzjymigosf.fsf@kernel.org> User-Agent: Gnus/5.13 (Gnus v5.13) X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" X-Spam-Status: No, score=-12.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Thu, Nov 12 2026, Mike Rapoport (Microsoft) wrote: > kho_bootmem=0% sets bootmem_scale to 0, and then the bootmem areas are > sized using the explicit sizes that default to 0. KHO remains enabled, > but there is no usable bootmem to load the next kernel. > > Reject zero scale the same way zero explicit sizes are rejected. > > Fixes: 3dc92c311498 ("kexec: add Kexec HandOver (KHO) generation helpers") > Signed-off-by: Mike Rapoport (Microsoft) Reviewed-by: Pratyush Yadav (Google) [...] -- Regards, Pratyush Yadav