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Re: [Qemu-devel] DAX can not work on virtual nvdimm device
From: |
Dan Williams |
Subject: |
Re: [Qemu-devel] DAX can not work on virtual nvdimm device |
Date: |
Fri, 19 Aug 2016 07:59:29 -0700 |
On Fri, Aug 19, 2016 at 4:19 AM, Xiao Guangrong
<address@hidden> wrote:
>
> Hi Dan,
>
> Recently, Redhat reported that nvml test suite failed on QEMU/KVM,
> more detailed info please refer to:
> https://bugzilla.redhat.com/show_bug.cgi?id=1365721
>
> The reason for this bug is that the memory region created by mmap()
> on the dax-based file was gone so that the region can not be found
> in /proc/self/smaps during the runtime.
>
> This is a simple way to trigger this issue:
> mount -o dax /dev/pmem0 /mnt/pmem/
> vim /mnt/pmem/xxx
> then 'vim' is crashed due to segment fault.
>
> This bug can be reproduced on your tree, the top commit is
> 10d7902fa0e82b (dax: unmap/truncate on device shutdown), the kernel
> configure file is attached.
>
> Your thought or comment is highly appreciated.
I'm going to be offline until Tuesday, but I will investigate when I'm
back. In the meantime if Ross or Vishal had an opportunity to take a
look I wouldn't say "no" :).
- [Qemu-devel] DAX can not work on virtual nvdimm device, Xiao Guangrong, 2016/08/19
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device,
Dan Williams <=
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Ross Zwisler, 2016/08/19
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Boaz Harrosh, 2016/08/21
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Xiao Guangrong, 2016/08/29
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Ross Zwisler, 2016/08/29
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Xiao Guangrong, 2016/08/30
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Dan Williams, 2016/08/30
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Xiao Guangrong, 2016/08/31
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Ross Zwisler, 2016/08/31