On Thu, Aug 06, 2020 at 10:45:42AM +0200, Norbert Lange wrote: > Am Do., 6. Aug. 2020 um 02:30 Uhr schrieb Russell King - ARM Linux > admin <li...@armlinux.org.uk>: > > > > On Thu, Aug 06, 2020 at 01:05:55AM +0200, Norbert Lange wrote: > > > diff --git a/arch/arm/boot/compressed/head.S > > > b/arch/arm/boot/compressed/head.S > > > index 434a16982e34..1af01bfe6638 100644 > > > --- a/arch/arm/boot/compressed/head.S > > > +++ b/arch/arm/boot/compressed/head.S > > > @@ -614,7 +614,11 @@ not_relocated: mov r0, #0 > > > */ > > > mov r0, r4 > > > mov r1, sp @ malloc space above stack > > > +#if defined(CONFIG_KERNEL_ZSTD) > > > + add r2, sp, #0x30000 @ Context needs ~160K > > > > That's going to mess up kexec: > > > > /* > > * The zImage length does not include its stack (4k) or its > > * malloc space (64k). Include this. > > */ > > len += 0x11000; > > > > I guess we need to add this to the information provided to kexec. > > Ouch, I guess it's rather impossible to load a new ZSTD kernel with a old > kexec version in that case. > > Some ideas to fix that would be: > > - Increase the padding to "192K + 4K is enough for everyone" in kexec > - Add the required/recommended stack+heap size to zImage so kexec can use > it.
This is definitely preferred. See patches - though this is only the kernel side. The first I've had for some time and isn't related to this issue. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
