From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D67CDEB64DA for ; Mon, 26 Jun 2023 16:22:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229579AbjFZQWn (ORCPT ); Mon, 26 Jun 2023 12:22:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52914 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229626AbjFZQW2 (ORCPT ); Mon, 26 Jun 2023 12:22:28 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F015230FD; Mon, 26 Jun 2023 09:20:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=6LUH4ra8Yl1TDl+4XlqQ5U8p0CDLO89uve3Fr0Kil4w=; b=aahUR+KLg6KR/ffBfCW3f0faE4 VhUU2i+bfpTo53kVwnECUFjwpF1EGV+Gx9CskK7sGzgmpCGABJvbXoa+RkeEc4un1fvySa27Y40qi fjXCivPyV9Mcyx+rc7jA3Oyjl9f+aiUZoiZIE3/oGx1urWhrCUUZDGaqZcQu/BYegttXt8r+Pk2P7 fyOyanSohw66Bp92VtuMcFMdWp1kW4PoqsDzIWleylfE2wsWFAS+fUZFEJrLRAhWYz9lDFUDY5P9X RALSI8H3FOncO+4t4XcD2SzaVKfw24qCDZneUGP5tZpnJqY6swVzkk+VlcLeWsHchgPLv31AgsG1o EoMKBeww==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:56504) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1qDovx-0003A4-10; Mon, 26 Jun 2023 17:19:21 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1qDovh-0004oC-LQ; Mon, 26 Jun 2023 17:19:05 +0100 Date: Mon, 26 Jun 2023 17:19:05 +0100 From: "Russell King (Oracle)" To: Eric DeVolder Cc: catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, geert@linux-m68k.org, tsbogend@alpha.franken.de, James.Bottomley@hansenpartnership.com, deller@gmx.de, ysato@users.sourceforge.jp, dalias@libc.org, glaubitz@physik.fu-berlin.de, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, kernel@xen0n.name, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, hpa@zytor.com, keescook@chromium.org, paulmck@kernel.org, peterz@infradead.org, frederic@kernel.org, akpm@linux-foundation.org, ardb@kernel.org, samitolvanen@google.com, juerg.haefliger@canonical.com, arnd@arndb.de, linus.walleij@linaro.org, sebastian.reichel@collabora.com, rppt@kernel.org, kirill.shutemov@linux.intel.com, anshuman.khandual@arm.com, ziy@nvidia.com, masahiroy@kernel.org, ndesaulniers@google.com, mhiramat@kernel.org, ojeda@kernel.org, thunder.leizhen@huawei.com, xin3.li@intel.com, tj@kernel.org, gregkh@linuxfoundation.org, tsi@tuyoix.net, bhe@redhat.com, hbathini@linux.ibm.com, sourabhjain@linux.ibm.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com Subject: Re: [PATCH v3 01/13] kexec: consolidate kexec and crash options into kernel/Kconfig.kexec Message-ID: References: <20230626161332.183214-1-eric.devolder@oracle.com> <20230626161332.183214-2-eric.devolder@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230626161332.183214-2-eric.devolder@oracle.com> Sender: Russell King (Oracle) Precedence: bulk List-ID: X-Mailing-List: linux-ia64@vger.kernel.org On Mon, Jun 26, 2023 at 12:13:20PM -0400, Eric DeVolder wrote: > +config KEXEC > + bool "Enable kexec system call" > + default ARCH_DEFAULT_KEXEC > + depends on ARCH_SUPPORTS_KEXEC > + select KEXEC_CORE > + help > + kexec is a system call that implements the ability to shutdown your > + current kernel, and to start another kernel. It is like a reboot > + but it is independent of the system firmware. And like a reboot > + you can start any kernel with it, not just Linux. > + > + The name comes from the similarity to the exec system call. > + > + It is an ongoing process to be certain the hardware in a machine > + is properly shutdown, so do not be surprised if this code does not > + initially work for you. As of this writing the exact hardware > + interface is strongly in flux, so no good recommendation can be > + made. Is this last paragraph still true? Is the hardware interface still "strongly in flux" ? -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!