On Mon, Dec 02, 2024 at 12:58:59AM +0530, Shrikanth Hegde wrote:
>
>
> On 11/26/24 16:23, Christophe Leroy wrote:
> >
> >
> > Le 16/11/2024 à 20:23, Shrikanth Hegde a écrit :
> > > Define preempt lazy bit for Powerpc. Use bit 9 which is free and within
> > > 16 bit range of NEED_RESCHED, so com
On Fri, Sep 27, 2024 at 02:42:25PM +0200, Geert Uytterhoeven wrote:
> Replace the deprecated "hp-det-gpio" and "mic-det-gpio" properties by
> "hp-det-gpios" resp. "mic-det-gpios" in Freescale Generic ASoC Sound
> Card device nodes.
>
> Signed-off-by: Geert Uytterhoeven
Applied, thanks!
Problem
=
With the increase of memory capacity and density, the probability of memory
error also increases. The increasing size and density of server RAM in data
centers and clouds have shown increased uncorrectable memory errors.
Currently, more and more scenarios that can tolerate memory
Currently, many scenarios that can tolerate memory errors when copying page
have been supported in the kernel[1~5], all of which are implemented by
copy_mc_[user]_highpage(). arm64 should also support this mechanism.
Due to mte, arm64 needs to have its own copy_mc_[user]_highpage()
architecture im
x86/powerpc has it's implementation of copy_mc_to_user(), we add generic
fallback in include/linux/uaccess.h prepare for other architechures to
enable CONFIG_ARCH_HAS_COPY_MC.
Signed-off-by: Tong Tiangen
Acked-by: Michael Ellerman
Reviewed-by: Mauro Carvalho Chehab
Reviewed-by: Jonathan Cameron
Currently, copy_mc_[user]_highpage() returns zero on success, or in case
of failures, the number of bytes that weren't copied.
While tracking the number of not copied works fine for x86 and PPC, There
are some difficulties in doing the same thing on ARM64 because there is no
available caller-saved
The copy_mc_to_kernel() helper is memory copy implementation that handles
source exceptions. It can be used in memory copy scenarios that tolerate
hardware memory errors(e.g: pmem_read/dax_copy_to_iter).
Currently, only x86 and ppc support this helper, Add this for ARM64 as
well, if ARCH_HAS_COPY_
For the arm64 kernel, when it processes hardware memory errors for
synchronize notifications(do_sea()), if the errors is consumed within the
kernel, the current processing is panic. However, it is not optimal.
Take copy_from/to_user for example, If ld* triggers a memory error, even in
kernel mode,
On Sun, 8 Dec 2024 at 14:54, Andreas Schwab wrote:
>
> This breaks userspace on ppc32. As soon as /init in the initrd is
> started the kernel hangs (without any messages).
Funky, funky. Most of the diff is the code movement (and some small
x86-specific stuff), so for ppc, the only part that shou
On Nov 22 2024, Linus Torvalds wrote:
> Josh Poimboeuf reports that he got a "will-it-scale.per_process_ops 1.9%
> improvement" report for his patch that changed __get_user() to use
> pointer masking instead of the explicit speculation barrier. However,
> that patch doesn't actually work in the g
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