Messages in this thread | | | Date | Thu, 21 Nov 2013 18:13:59 +0900 | From | Yasuaki Ishimatsu <> | Subject | Re: [PATCH] x86, efi: change name of efi_no_storage_paranoia parameter to efi_storage_paranoia |
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(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 >
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