From: "Richard W.M. Jones" <rjones@redhat.com>
To: qemu-devel@nongnu.org
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Subject: [Qemu-devel] Question about vNVDIMM file format
Date: Mon, 16 May 2016 16:04:01 +0100 [thread overview]
Message-ID: <20160516150401.GC28935@redhat.com> (raw)
I'm playing with ext4 and DAX.
I'm using:
-object memory-backend-file,id=mem1,share,mem-path=/var/tmp/pmem,size=4G \
-device nvdimm,memdev=mem1,id=nv1
where /var/tmp/pmem is a 4 GB ext4 filesystem image (no partition
table). I can mount this in the guest using:
mount -o dax /dev/pmem0 /mnt
and everything appears to work.
I read in the mailing list that the pmem file has some internal
structure for storing config data, stored in the last 128 KB of the
file. Is that still the case?
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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next reply other threads:[~2016-05-16 15:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-16 15:04 Richard W.M. Jones [this message]
2016-05-16 16:53 ` [Qemu-devel] Question about vNVDIMM file format Stefan Hajnoczi
2016-05-16 18:25 ` Richard W.M. Jones
2016-05-18 7:04 ` Xiao Guangrong
2016-05-18 8:11 ` Zhang, Haozhong
2016-05-18 10:50 ` Richard W.M. Jones
2016-05-18 17:36 ` Richard W.M. Jones
2016-05-16 17:39 ` Xiao Guangrong
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