Re: [PATCH v2] powerpc/powermac: Fix low_sleep_handler with CONFIG_VMAP_STACK
Hello Christophe,
Il giorno mar, 08/12/2020 alle 05.24 +, Christophe Leroy ha
scritto:
> low_sleep_handler() can't restore the context from standard
> stack because the stack can hardly be accessed with MMU OFF.
>
> Store everything in a global storage area instead of storing
> a pointer to the stack in that global storage area.
>
> To avoid a complete churn of the function, still use r1 as
> the pointer to the storage area during restore.
>
> Reported-by: Giuseppe Sacco
> Fixes: cd08f109e262 ("powerpc/32s: Enable CONFIG_VMAP_STACK")
> Signed-off-by: Christophe Leroy
> ---
> This is only build tested. Giuseppe can you test it ? Thanks.
>
> v2: Changed an erroneous 'addis' to 'addi' ; Using bss instead of
> data section
> Signed-off-by: Christophe Leroy
> ---
> arch/powerpc/platforms/Kconfig.cputype | 2 +-
> arch/powerpc/platforms/powermac/sleep.S | 132 +++---
> --
> 2 files changed, 60 insertions(+), 74 deletions(-)
[...]
I just tested the v2 patch against latest kernel. Please note that
yesterday patch was on a kernel named 5.10.0-rc6+, while today's patch
is on a kernel named 5.10.0-rc7+. Even with the latest kernel updates,
the patch apply correctly and machine boots normally, fixing the
problem.
$ uname -a
Linux titanium4 5.10.0-rc7+ #3 Tue Dec 8 09:11:20 CET 2020 ppc GNU/Linux
$ grep VMAP /boot/config-5.10.0-rc7+
CONFIG_HAVE_ARCH_VMAP_STACK=y
CONFIG_VMAP_STACK=y
Thank you again.
Bye,
Giuseppe
kernel crash using XFS over raid5 partition
Hi all, I am facing a kernel bug[1] that completely crashes my machines. During the last days I tried to fine tune the problem and I am now inclined for a bug in libata/sata_sil or device mapper code. I activated the DEBUG messages in raid5 source module, but I cannot find a way to do the same with libata. Is there any #define I may use? Thanks, Giuseppe [1]http://bugme.osdl.org/show_bug.cgi?id=3968 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
kernel crash using XFS over raid5 partition
Hi all, I am facing a kernel bug[1] that completely crashes my machines. During the last days I tried to fine tune the problem and I am now inclined for a bug in libata/sata_sil or device mapper code. I activated the DEBUG messages in raid5 source module, but I cannot find a way to do the same with libata. Is there any #define I may use? Thanks, Giuseppe [1]http://bugme.osdl.org/show_bug.cgi?id=3968 - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
