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SubjectRe: [PATCH v3 1/3] arm64/ras: support sea error recovery
On Thu, Sep 07, 2017 at 03:45:14PM +0800, Xie XiuQi wrote:
> With ARM v8.2 RAS Extension, SEA are usually triggered when memory errors
> are consumed. In some cases, if the error address is in a clean page or a
> read-only page, there is a chance to recover. Such as error occurs in a
> instruction page, we can reread this page from disk instead of killing
> process.
>
> Because memory_failure() may sleep, we can not call it directly in SEA
> exception context. So we saved faulting physical address associated with
> a process in the ghes handler and set __TIF_SEA_NOTIFY. When we return
> from SEA exception context and get into do_notify_resume() before the
> process running, we could check it and call memory_failure() to do
> recovery. It's safe, because we are in process context.
>
> Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
> Signed-off-by: Wang Xiongfeng <wangxiongfeng2@huawei.com>

This is not a correct SOB chain, please check:

Documentation/process/submitting-patches.rst, section 11.

> ---
> arch/arm64/Kconfig | 11 +++
> arch/arm64/include/asm/ras.h | 36 +++++++++
> arch/arm64/include/asm/thread_info.h | 4 +-
> arch/arm64/kernel/Makefile | 1 +
> arch/arm64/kernel/ras.c | 141 +++++++++++++++++++++++++++++++++++
> arch/arm64/kernel/signal.c | 8 ++
> arch/arm64/mm/fault.c | 27 +++++--
> drivers/acpi/apei/ghes.c | 4 +-
> 8 files changed, 221 insertions(+), 11 deletions(-)
> create mode 100644 arch/arm64/include/asm/ras.h
> create mode 100644 arch/arm64/kernel/ras.c

What tree are those patches against?

They don't apply cleanly against latest mainline:

checking file arch/arm64/Kconfig
Hunk #1 succeeded at 641 (offset 1 line).
checking file arch/arm64/include/asm/ras.h
checking file arch/arm64/include/asm/thread_info.h
Hunk #1 FAILED at 86.
Hunk #2 succeeded at 98 (offset -4 lines).
Hunk #3 FAILED at 112.
2 out of 3 hunks FAILED
checking file arch/arm64/kernel/Makefile
checking file arch/arm64/kernel/ras.c
checking file arch/arm64/kernel/signal.c
Hunk #1 succeeded at 40 with fuzz 1 (offset 2 lines).
Hunk #2 FAILED at 750.
1 out of 2 hunks FAILED
checking file arch/arm64/mm/fault.c
Hunk #1 succeeded at 631 (offset 37 lines).
checking file drivers/acpi/apei/ghes.c

--
Regards/Gruss,
Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--

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