From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754003Ab3KUJOt (ORCPT ); Thu, 21 Nov 2013 04:14:49 -0500 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:34130 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753211Ab3KUJOm (ORCPT ); Thu, 21 Nov 2013 04:14:42 -0500 X-SecurityPolicyCheck: OK by SHieldMailChecker v2.0.1 X-SHieldMailCheckerPolicyVersion: FJ-ISEC-20120718-3 Message-ID: <528DCED7.5070806@jp.fujitsu.com> Date: Thu, 21 Nov 2013 18:13:59 +0900 From: Yasuaki Ishimatsu User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: joeyli CC: Madper Xie , Matt Fleming , Richard Weinberger , , , , Subject: Re: [PATCH] x86, efi: change name of efi_no_storage_paranoia parameter to efi_storage_paranoia References: <527C93B5.7010407@jp.fujitsu.com> <527C9B5C.6040509@nod.at> <527CB013.30200@jp.fujitsu.com> <527CB0F4.8080606@nod.at> <527CBC05.6080505@jp.fujitsu.com> <527CBD01.1000908@nod.at> <527CBDD3.2020609@jp.fujitsu.com> <20131108143421.GB22636@console-pimps.org> <52809AEB.9080100@jp.fujitsu.com> <20131111105424.GD22636@console-pimps.org> <528AD50D.6060503@jp.fujitsu.com> <87siutqdwv.fsf@redhat.com> <528C562B.3070008@jp.fujitsu.com> <1384934881.6516.4082.camel@linux-s257.site> In-Reply-To: <1384934881.6516.4082.camel@linux-s257.site> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-SecurityPolicyCheck-GC: OK by FENCE-Mail Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (2013/11/20 17:08), joeyli wrote: > 於 三，2013-11-20 於 15:26 +0900，Yasuaki Ishimatsu 提到： >> (2013/11/19 12:16), Madper Xie wrote: >>> >>> isimatu.yasuaki@jp.fujitsu.com writes: >>> >>>> Hi Matt, >>>> >>>> Sorry for late the reply. >>>> >>>> >>>> (2013/11/11 19:54), Matt Fleming wrote: >>>>> On Mon, 11 Nov, at 05:52:59PM, Yasuaki Ishimatsu wrote: >>>>>> Hi Matt, >>>>>> >>>>>> I uses FUJITSU's x86 box. >>>>>> This does not become bricked even if I use all efi variable storage. >>>>>> Thus I want a way to not need to specify efi_no_storage_paranoia >>>>>> parameter. >>>>> >>>>> The efi_no_storage_paranoia parameter was introduced because some >>>>> machines do not initiate garbage collection of the NVRAM until you >>>>> allocate all space - basically it's a switch to turn off the "save 5KB >>>>> of stoarge at all times" workaround that is needed to avoid bricking >>>>> some machines. >>>>> >>>>> The intention of the switch is not to allow you to fill your NVRAM just >>>>> because you can. If that is something you want to do then I think it's >>>>> fair to require you to explicitly turn on efi_no_storage_paranoia. But >>>>> I'm assuming here that you are doing something like writing lots and >>>>> lots of pstore entries and just want to write as many as your variable >>>>> storage will allow? Or are you doing something more fundamental like >>>>> creating BootXXXX entries? >>>>> >>>>> What are you doing to run into the 5KB reserve? How much NVRAM does your >>>>> machine come with? >>>> >>>> I just add boot entry to NVRAM by efibootmgr command. But when Linux boots up, >>>> the remaining NVRAM is less than 5Kbyte. So I cannnot add new entry. >>>> >>> Howdy Yasuaki, >>> If the remaining NVRAM is less than 5Kb, your writing will trigger a >>> NVRAM storage reclamation. However you still failed creating entry. So >>> I'm just curious what itmes occupy lots of nvram storage space. >> >> Even if we got EFI_OUT_OF_RESOURCES while running Linux, gc does not run. >> Trigger of gc is when EFI_OUT_OF_RESOURCES occurs on pre OS environment with >> UEFI. So on my system, if EFI_OUT_OF_RESOURCES occurs by the 5Kbyte threshold, >> we cannot use nvram storage until EFI_OUT_OF_RESOURCES occurs on pre OS >> environment with UEFI. >> >> Thanks, >> Yasuaki Ishimatsu > > Can we try to trigger gc by EFI_OUT_OF_RESOURCE in EFI stub kernel or > EFI boot loader to recover NVRAM space? Does work with the BIOS on this > machine? Yes. I can trigger gc by EFI_OUT_OF_RESOUCE in EFI shell on my machine. Thanks, Yasuaki Ishimatu > > > Thanks a lot! > Joey Lee >