Bezüglich Harry Schmalzbauer's Nachricht vom 16.05.2017 18:26 (localtime): > B … >>>> The issue is, that current UEFI implementation is using 64MB staging >>>> memory for loading the kernel and modules and files. When the boot is >>>> called, the relocation code will put the bits from staging area into the >>>> final places. The BIOS version does not need such staging area, and that >>>> will explain the difference. >>>> >>>> I actually have different implementation to address the same problem, >>>> but thats for illumos case, and will need some work to make it usable >>>> for freebsd; the idea is actually simple - allocate staging area per >>>> loaded file and relocate the bits into the place by component, not as >>>> continuous large chunk (this would also allow to avoid the mines like >>>> planted by hyperv;), but right now there is no very quick real solution >>>> other than just build efi loader with larger staging size. >>> Ic, thanks for the explanation. >>> While not aware about the purpose of the staging area nor the >>> consequences of enlarging it, do you think it's feasable increasing it >>> to 768Mib? >>> >>> At least now I have an idea baout the issue and an explanation why >>> reducing md_imgae to 100MB hasn't helped – still more than 64... >>> >>> Any quick hint where to define the staging area size highly appreciated, >>> fi there are no hard objections against a 768MB size. >>> >>> -harry >> The problem is that before UEFI Boot Services are not switched off, the >> memory is managed (and owned) by the firmware, > Hmm, I've been expecting something like that (owend by firmware) ;-) > > So I'll stay with CSM for now, and will happily be an early adopter if > you need someone to try anything (-stable mergable).
Toomas, thanks for your help so far! I'm just curious if there's news on this. Was there a decision made whether kernel should be utilized to relocate the MD image modules or the loader should be extended to handle (x-)large staging areas? I'd like to switch back to UEFI booting for various reasons (most priority has consistency), but can't since it breaks md-rootfs with that machine (the other run ESXi still). If there's anything to test, please let me know. Thanks, -harry _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
