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* [PATCH] powerpc: Enable kernel XZ compression option on 44x
@ 2019-01-31 20:59 Christian Lamparter
  2019-02-08 13:02 ` Michael Ellerman
  0 siblings, 1 reply; 3+ messages in thread
From: Christian Lamparter @ 2019-01-31 20:59 UTC (permalink / raw)
  To: linuxppc-dev; +Cc: Paul Mackerras

Enable kernel XZ compression option on 44x.
Tested on a Western Digital - MyBook Live NAS.
It takes 22 seconds for the 800 MHz CPU to decompress
and boot a 2.63 MiB XZ-compressed kernel simpleImage.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
---
 arch/powerpc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 2890d36eb531..58b6ad3555e0 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -201,7 +201,7 @@ config PPC
 	select HAVE_IOREMAP_PROT
 	select HAVE_IRQ_EXIT_ON_IRQ_STACK
 	select HAVE_KERNEL_GZIP
-	select HAVE_KERNEL_XZ			if PPC_BOOK3S
+	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
 	select HAVE_KPROBES
 	select HAVE_KPROBES_ON_FTRACE
 	select HAVE_KRETPROBES
-- 
2.20.1


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: powerpc: Enable kernel XZ compression option on 44x
  2019-01-31 20:59 [PATCH] powerpc: Enable kernel XZ compression option on 44x Christian Lamparter
@ 2019-02-08 13:02 ` Michael Ellerman
  2019-02-08 15:17   ` Christian Lamparter
  0 siblings, 1 reply; 3+ messages in thread
From: Michael Ellerman @ 2019-02-08 13:02 UTC (permalink / raw)
  To: Christian Lamparter, linuxppc-dev; +Cc: Paul Mackerras

On Thu, 2019-01-31 at 20:59:04 UTC, Christian Lamparter wrote:
> Enable kernel XZ compression option on 44x.
> Tested on a Western Digital - MyBook Live NAS.
> It takes 22 seconds for the 800 MHz CPU to decompress
> and boot a 2.63 MiB XZ-compressed kernel simpleImage.
> 
> Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/423bfc69d7f491c47fc35921f7d460be

cheers

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: powerpc: Enable kernel XZ compression option on 44x
  2019-02-08 13:02 ` Michael Ellerman
@ 2019-02-08 15:17   ` Christian Lamparter
  0 siblings, 0 replies; 3+ messages in thread
From: Christian Lamparter @ 2019-02-08 15:17 UTC (permalink / raw)
  To: Michael Ellerman; +Cc: Paul Mackerras, Pawel Dembicki, linuxppc-dev

On Friday, February 8, 2019 2:02:41 PM CET Michael Ellerman wrote:
> On Thu, 2019-01-31 at 20:59:04 UTC, Christian Lamparter wrote:
> > Enable kernel XZ compression option on 44x.
> > Tested on a Western Digital - MyBook Live NAS.
> > It takes 22 seconds for the 800 MHz CPU to decompress
> > and boot a 2.63 MiB XZ-compressed kernel simpleImage.
> > 
> > Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
> 
> Applied to powerpc next, thanks.
> 
> https://git.kernel.org/powerpc/c/423bfc69d7f491c47fc35921f7d460be
> 
> cheers
> 

Hello,

I'm happy to report that a xz compressed kernel (as simpleImage)
also booted on a TP-Link WDR4900-v1 (Freescale P1014):
<https://github.com/openwrt/openwrt/pull/1773#issuecomment-461082045>

Hence, I'm inclined to also add PPC_85xx to list in /arch/powerpc/KConfig

|select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x || PPC_85xx

But on the other hand, it could very well be that more or all? PPC
would benifit from having HAVE_KERNEL_XZ available. What do you think?
(If you know of any interesting ARCHs, I could ask around too.)

Regards,
Christian



^ permalink raw reply	[flat|nested] 3+ messages in thread

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2019-01-31 20:59 [PATCH] powerpc: Enable kernel XZ compression option on 44x Christian Lamparter
2019-02-08 13:02 ` Michael Ellerman
2019-02-08 15:17   ` Christian Lamparter

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