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Re: [Qemu-devel] [PATCH 0/7] Improve buffer_is_zero
From: |
Vijay Kilari |
Subject: |
Re: [Qemu-devel] [PATCH 0/7] Improve buffer_is_zero |
Date: |
Thu, 25 Aug 2016 12:07:26 +0530 |
Hi Richard,
Migration fails on arm64 with these patches.
On the destination VM, follow errors are appearing.
qemu-system-aarch64: VQ 0 size 0x400 Guest index 0x0 inconsistent with
Host index 0x1937: delta 0xe6c9
qemu-system-aarch64: error while loading state for instance 0x0 of
device 'address@hidden/virtio-net'
qemu-system-aarch64: load of migration failed: Operation not permitted
qemu-system-aarch64: network script /etc/qemu-ifdown failed with status 256
Regards
Vijay
On Wed, Aug 24, 2016 at 9:47 AM, Richard Henderson <address@hidden> wrote:
> Patches 1-3 remove the use of ifunc from the implementation.
>
> Patch 5 adjusts the x86 implementation a bit more to take
> advantage of ptest (in sse4.1) and unaligned accesses (in avx1).
>
> Patches 2 and 6 are the result of my conversation with Vijaya
> Kumar with respect to ThunderX.
>
> Patch 7 is the result of seeing some really really horrible code
> produced for ppc64le (gcc 4.9 and mainline).
>
> This has had limited testing. What I don't know is the best way
> to benchmark this -- the only way I know to trigger this is via
> the console, by hand, which doesn't make for reasonable timing.
>
>
> r~
>
>
> Richard Henderson (7):
> cutils: Remove SPLAT macro
> cutils: Export only buffer_is_zero
> cutils: Rearrange buffer_is_zero acceleration
> cutils: Add generic prefetch
> cutils: Rewrite x86 buffer zero checking
> cutils: Rewrite aarch64 buffer zero checking
> cutils: Rewrite ppc buffer zero checking
>
> configure | 21 +-
> include/qemu/cutils.h | 2 -
> migration/ram.c | 2 +-
> migration/rdma.c | 5 +-
> util/cutils.c | 526
> +++++++++++++++++++++++++++++++++-----------------
> 5 files changed, 352 insertions(+), 204 deletions(-)
>
> --
> 2.7.4
>
Re: [Qemu-devel] [PATCH 0/7] Improve buffer_is_zero,
Vijay Kilari <=