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Re: [Qemu-block] [PATCH for-2.7 00/15] block: Lock images when opening
From: |
Fam Zheng |
Subject: |
Re: [Qemu-block] [PATCH for-2.7 00/15] block: Lock images when opening |
Date: |
Thu, 14 Apr 2016 14:23:13 +0800 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Thu, 04/14 09:14, Denis V. Lunev wrote:
> On 04/14/2016 08:46 AM, Fam Zheng wrote:
> >On Thu, 04/14 08:04, Denis V. Lunev wrote:
> >>unfortunately no. If the lock will be on the image file,
> >>we will have get it on the target node on QEMU start
> >>and re-acquire it in bdrv_invalidate_cache.
> >>
> >> From my POW you should not get the lock if
> >>BDRV_O_INACTIVE is set.
> >That is what I meant. :)
> >
> >At source: Images are unlocked in bdrv_inactivate().
> >
> >At destinition: Images are not locked if opened with BDRV_O_INACTIVE, and
> >are locked in bdrv_invalidate_cache() (at the INMIGRATE -> RUNNING switch).
> >
> >Fam
> it looks I have missed something. The above will work, but
> I do not see clause where you set BDRV_O_NOLOCK when BDRV_O_INACTIVE
> is set.
>
> Do you mean that we will not reach bdrv_open_common with this flag
> set?
I'm updating the patch to also check BDRV_O_INACTIVE in bdrv_open_common in v2.
Fam
- [Qemu-block] [PATCH for-2.7 12/15] qemu-iotests: 051: Disable image lock in the command line, (continued)
- [Qemu-block] [PATCH for-2.7 12/15] qemu-iotests: 051: Disable image lock in the command line, Fam Zheng, 2016/04/13
- [Qemu-block] [PATCH for-2.7 15/15] block: Turn on image locking by default, Fam Zheng, 2016/04/13
- [Qemu-block] [PATCH for-2.7 14/15] ide-test: Specify "lock-image=off" in command lines, Fam Zheng, 2016/04/13
- Re: [Qemu-block] [PATCH for-2.7 00/15] block: Lock images when opening, Daniel P. Berrange, 2016/04/13
- Re: [Qemu-block] [PATCH for-2.7 00/15] block: Lock images when opening, Denis V. Lunev, 2016/04/13
Re: [Qemu-block] [Qemu-devel] [PATCH for-2.7 00/15] block: Lock images when opening, Richard W.M. Jones, 2016/04/17