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 X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E06FC32751 for ; Wed, 31 Jul 2019 21:01:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DFDE2064A for ; Wed, 31 Jul 2019 21:01:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="q4V/tb8Z"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="xhUvssgZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727902AbfGaVBi (ORCPT ); Wed, 31 Jul 2019 17:01:38 -0400 Received: from bedivere.hansenpartnership.com ([66.63.167.143]:35166 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726268AbfGaVBh (ORCPT ); Wed, 31 Jul 2019 17:01:37 -0400 Received: from localhost (localhost [127.0.0.1]) by bedivere.hansenpartnership.com (Postfix) with ESMTP id F36AB8EE130; Wed, 31 Jul 2019 14:01:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1564606897; bh=vBOB+syYkpDiz5jdV6DoreXgh7FGALuNPuH8agcc/Ck=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=q4V/tb8Z7gufLEsYb7kUmXm85kYCArhj0d7T9Rpn0IAvpBhRBlqrGrlHDfcxNOSb+ dpTVkIV+WTPB8+c9ee4CXEQROt9hxeNoKGN2YGzm9IXetFm8n0tZLaJhkgEyGiAeQK L+hSIa0X5jiDmNBOWhzsfADsoIOalw1MFVQezAlk= Received: from bedivere.hansenpartnership.com ([127.0.0.1]) by localhost (bedivere.hansenpartnership.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Lo197QTfscc2; Wed, 31 Jul 2019 14:01:36 -0700 (PDT) Received: from jarvis.lan (unknown [50.35.71.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bedivere.hansenpartnership.com (Postfix) with ESMTPSA id 24BED8EE10C; Wed, 31 Jul 2019 14:01:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1564606896; bh=vBOB+syYkpDiz5jdV6DoreXgh7FGALuNPuH8agcc/Ck=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=xhUvssgZfpJPLzbOTMo+j0VTQA/0dchDgorayf0dUR6WbaQT4iLNsm4vRvYS709MG jIbEaRHU/iDYbODRbW4XctX/YsX3nfUY5RPd5HnQqo+P9t6eOqCbiBSb5LSHPXqupH P/C+Q46mbp33LXLSfj2Wv/XS1QLE4cfLALPnIsQQ= Message-ID: <1564606894.3319.72.camel@HansenPartnership.com> Subject: Re: Compressed kernels currently won't boot From: James Bottomley To: Sven Schnelle Cc: Parisc List Date: Wed, 31 Jul 2019 14:01:34 -0700 In-Reply-To: <20190731194413.GB23520@t470p.stackframe.org> References: <1564591443.3319.30.camel@HansenPartnership.com> <20190731173016.GA23520@t470p.stackframe.org> <1564595402.3319.40.camel@HansenPartnership.com> <1564602012.3319.45.camel@HansenPartnership.com> <20190731194413.GB23520@t470p.stackframe.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On Wed, 2019-07-31 at 21:44 +0200, Sven Schnelle wrote: > Hi James, > > On Wed, Jul 31, 2019 at 12:40:12PM -0700, James Bottomley wrote: > > > What about causing the compressed make to build both a stripped and > > a non-stripped bzImage (say sbzImage and bzImage). That way you > > always have the stripped one available for small size things like > > boot from tape or DVD? but in the usual case we use the bzImage > > with full contents. > > In that case we would also need to build two lifimages - how about > adding a config option option? Something like "Strip debug > information from compressed kernel images"? Actually, I just looked at what x86 does. It has this in the arch/x86/boot/compressed/Makefile: OBJCOPYFLAGS_vmlinux.bin := -R .comment -S $(obj)/vmlinux.bin: vmlinux FORCE $(call if_changed,objcopy) So it basically strips all the debug information from the kernel before compressing, which argues there's no need to retain the information because x86 doesn't bother. James