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SubjectRe: [PATCH v2 0/3] arm64: Add support for handling memory corruption
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Hi Manoj,

Manoj Iyer <manoj.iyer@canonical.com> writes:

> On Wed, May 17, 2017 at 10:23 AM, Punit Agrawal
> <punit.agrawal@arm.com> wrote:
>
> Hi, This series enables memory failure handling for arm64.
> Previous posting can be found at [0]. Changes since v1: * Reworked
> Patch 1 based on Catalin's feedbak to symmetrically deal with PUD
> and PMD hugepages in huge_pte_offset() * Added Steve's acks With
> support for contiguous hugepages being turned off[1], some of the
> problems arising from swap entries go away[2]. This simplifies the
> changes needed to enable memory corruption handling for arm64
> (done in this seris). In this series, we updates huge_pte_offset()
> to correctly deal with swap entries (Patch 1). This function will
> need to be updated when contiguous hugepages are re-enabled. Patch
> 2 adds support to send SIGBUS to processes that have their memory
> corrupted. With the prerequisites in place, enable memory
> corruption handling for arm64 (patch 3).
>
> Thanks, Punit [0]
> https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1376052.html
> [1] https://lkml.org/lkml/2017/4/7/486 [2]
> https://lkml.org/lkml/2017/4/5/402 Jonathan (Zhixiong) Zhang (2):
> arm64: hwpoison: add VM_FAULT_HWPOISON[_LARGE] handling arm64:
> kconfig: allow support for memory failure handling Punit Agrawal
> (1): arm64: hugetlb: Fix huge_pte_offset to return poisoned page
> table entries arch/arm64/Kconfig | 1 +
> arch/arm64/include/asm/pgtable.h | 2 +- arch/arm64/mm/fault.c | 22
> +++++++++++++++++++--- arch/arm64/mm/hugetlbpage.c | 29
> ++++++++++------------------- 4 files changed, 31 insertions(+),
> 23 deletions(-)
> --
> 2.11.0
>
> I applied Jonathans 2 patches to Ubuntu Zesty kernel (4.10) and ran
> the mce-test ./run_hugepage.sh after fixing a few things in the test
> case. This generated the bad pmd messages.
>
> linux-4.10.0/mm/pgtable-generic.c:33: bad pmd 0000000172420074.
>
> Then I applied Punit's patch to the kernel and re-ran the mce-test and
> did not see the bad pmd messages. The tests were done on a Qualcomm
> Centriq 2400 platform.
>
> Tested-by: Manoj Iyer <manoj.iyer@canonical.com>

Thanks for taking the patches for a spin.

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