[sheepdog] RFT: locking issue of qemu-img and qemu-io

[Hitoshi Mitake]

On Thu, Jan 22, 2015 at 11:24 PM, 徐小龙 <nxtxiaolong at gmail.com> wrote:
> Xiaolong Xu <nxtxiaolong at gmail.com>
>
> Thanks,
> xiaolong xu

Thanks for your tag. From next time, could you reply to the list, too?

Thanks,
Hitoshi

>
> On Thu, Jan 22, 2015 at 10:15 PM, Hitoshi Mitake <mitake.hitoshi at gmail.com>
> wrote:
>>
>> At Thu, 22 Jan 2015 19:43:08 +0800,
>> 徐小龙 wrote:
>> >
>> > hi,hitoshi,
>> >    I have tested this patch using branch
>> > https://github.com/sheepdog/qemu/tree/locking
>> > with follow methods and results:
>> >
>> > 1、test qemu-img
>> > root at hty-compute1:~# ./qemu-locking/qemu-img create -f raw sheepdog:test
>> > 1G
>> > Formatting 'sheepdog:test', fmt=raw size=1073741824
>> >
>> > root at hty-compute1:~# ./qemu-locking/qemu-img snapshot -c test-snap
>> > sheepdog:test
>> > WARNING: Image format was not specified for 'sheepdog:test' and probing
>> > guessed raw.
>> >          Automatically detecting the format is dangerous for raw images,
>> > write operations on block 0 will be restricted.
>> >          Specify the 'raw' format explicitly to remove the restrictions.
>> >
>> > root at hty-compute1:~# ./qemu-locking/qemu-img create -b
>> > sheepdog:test:test-snap sheepdog:test-c 1G
>> > Formatting 'sheepdog:test-c', fmt=raw size=1073741824
>> > backing_file='sheepdog:test:test-snap'
>> >
>> > 2、test qemu-io
>> > root at hty-compute1:~# ./qemu-locking/qemu-io -c "write 0 4096"
>> > sheepdog:test
>> > wrote 4096/4096 bytes at offset 0
>> > 4 KiB, 1 ops; 0.0334 sec (119.435 KiB/sec and 29.8588 ops/sec)
>> >
>> > root at hty-compute1:~# ./qemu-locking/qemu-io -c "write 0 4096"
>> > sheepdog:test-c
>> > wrote 4096/4096 bytes at offset 0
>> > 4 KiB, 1 ops; 0.2805 sec (14.257 KiB/sec and 3.5641 ops/sec)
>> >
>> > root at hty-compute1:~# ./qemu-locking/qemu-io -c "read 0 4096"
>> > sheepdog:test-c
>> > read 4096/4096 bytes at offset 0
>> > 4 KiB, 1 ops; 0.0001 sec (21.823 MiB/sec and 5586.5922 ops/sec)
>> >
>> > root at hty-compute1:~# ./qemu-locking/qemu-io -c "read 0 4096"
>> > sheepdog:test
>> > read 4096/4096 bytes at offset 0
>> > 4 KiB, 1 ops; 0.0002 sec (17.058 MiB/sec and 4366.8122 ops/sec)
>> >
>> > seems work fine.
>>
>> Xiaolong, thanks a lot for testing. Could you give me your Tested-by
>> tag? I want to add your tag to the patch when I post it to QEMU list.
>>
>> Thanks,
>> Hitoshi
>>
>> >
>> > Thanks&Best Regards,
>> > Xiaolong Xu
>> >
>> > On Thu, Jan 22, 2015 at 5:26 PM, Hitoshi Mitake <
>> > mitake.hitoshi at lab.ntt.co.jp> wrote:
>> >
>> > >
>> > > Hi Jinzhi and Xiaolong,
>> > >
>> > > I created a patch for the locking problem of qemu-img and qemu-io. It
>> > > can be found here:
>> > > https://github.com/sheepdog/qemu/tree/locking
>> > > # It depends on ongoing patchset, so I cannot post immediately
>> > >
>> > > Could you test the branch and report your result?
>> > >
>> > > Thanks,
>> > > Hitoshi
>> > >
>
>