Hi Dave, On Thu, 2015-10-22 at 11:17 +0800, Dave Young wrote: > On 10/21/15 at 04:12pm, Geoff Levand wrote: > > Add a new option --lite to kexec that allows for a fast reboot > > by avoiding the purgatory integrity checks. This option is > > intended for use by kexec based bootloaders that load a new > > image and then immediately transfer control to it. > > I think Vivek was rejecting this --lite since kdump need the purgatory > integrity checks. Ccing him. As stated, this is not intended for use by kdump. This is an optional feature. It does not remove the integrity checks, but provides the user a way to bypass them if they so desire. > > It was reported that on some systems where purgatory is running > > without caches enabled the sha256 calculations would take several > > minutes. For bootloaders that just load a new image and > > immediately jump into it the loss of the integrity check is worth > > the increase in boot speed. Please consider. > > Pratyush reported the arm64 issue, he sent a patch to fix it with > enabling cache for purgatory. I think the patch can fix the problem. > Why not fix it? The fix is simple enough and it does not introduce > complicate logic. This patch also is simple, and is architecture independent. I see this feature as an improvement to kexec, not necessarily as a fix for that problem. -Geoff
