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[Qemu-devel] DAX can not work on virtual nvdimm device
From: |
Xiao Guangrong |
Subject: |
[Qemu-devel] DAX can not work on virtual nvdimm device |
Date: |
Fri, 19 Aug 2016 19:19:20 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 |
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.
Thanks!
config-dax
Description: Text document
- [Qemu-devel] DAX can not work on virtual nvdimm device,
Xiao Guangrong <=
- Re: [Qemu-devel] DAX can not work on virtual nvdimm device, Dan Williams, 2016/08/19
- 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