When using the post-copy preemption feature to perform post-copy live
migration, the below scenario could lead to a deadlock and the migration
will never finish:
- Source connect() the preemption channel in postcopy_start().
- Source and the destination side TCP stack finished the 3-way handshak
On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
> When using the post-copy preemption feature to perform post-copy live
> migration, the below scenario could lead to a deadlock and the migration will
> never finish:
>
> - Source connect() the preemption channel in postcopy_start().
> - Sou
On Fri, Mar 29, 2024 at 08:54:07AM +, Wang, Wei W wrote:
> On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
> > When using the post-copy preemption feature to perform post-copy live
> > migration, the below scenario could lead to a deadlock and the migration
> > will
> > never finish:
> >
Peter Xu writes:
> On Fri, Mar 29, 2024 at 08:54:07AM +, Wang, Wei W wrote:
>> On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
>> > When using the post-copy preemption feature to perform post-copy live
>> > migration, the below scenario could lead to a deadlock and the migration
>> > w
On Mon, Apr 01, 2024 at 02:17:28PM -0300, Fabiano Rosas wrote:
> Peter Xu writes:
>
> > On Fri, Mar 29, 2024 at 08:54:07AM +, Wang, Wei W wrote:
> >> On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
> >> > When using the post-copy preemption feature to perform post-copy live
> >> > migra
Peter Xu writes:
> On Mon, Apr 01, 2024 at 02:17:28PM -0300, Fabiano Rosas wrote:
>> Peter Xu writes:
>>
>> > On Fri, Mar 29, 2024 at 08:54:07AM +, Wang, Wei W wrote:
>> >> On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
>> >> > When using the post-copy preemption feature to perform p
On 4/2/2024 0:13, Peter Xu wrote:> On Fri, Mar 29, 2024 at 08:54:07AM +,
Wang, Wei W wrote:
>> On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
>>> When using the post-copy preemption feature to perform post-copy live
>>> migration, the below scenario could lead to a deadlock and the migra
On Tuesday, April 2, 2024 12:13 AM, Peter Xu wrote:
> On Fri, Mar 29, 2024 at 08:54:07AM +, Wang, Wei W wrote:
> > On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
> > > When using the post-copy preemption feature to perform post-copy
> > > live migration, the below scenario could lead to
On Tuesday, April 2, 2024 2:56 PM, Wang, Lei4 wrote:
> On 4/2/2024 0:13, Peter Xu wrote:> On Fri, Mar 29, 2024 at 08:54:07AM +,
> Wang, Wei W wrote:
> >> On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
> >>> When using the post-copy preemption feature to perform post-copy
> >>> live migra
On 4/2/2024 15:25, Wang, Wei W wrote:> On Tuesday, April 2, 2024 2:56 PM, Wang,
Lei4 wrote:
>> On 4/2/2024 0:13, Peter Xu wrote:> On Fri, Mar 29, 2024 at 08:54:07AM +,
>> Wang, Wei W wrote:
On Friday, March 29, 2024 11:32 AM, Wang, Lei4 wrote:
> When using the post-copy preemption feat
On Tue, Apr 02, 2024 at 05:28:36PM +0800, Wang, Lei wrote:
> On 4/2/2024 15:25, Wang, Wei W wrote:> On Tuesday, April 2, 2024 2:56 PM,
> Wang,
> Lei4 wrote:
> >> On 4/2/2024 0:13, Peter Xu wrote:> On Fri, Mar 29, 2024 at 08:54:07AM
> >> +,
> >> Wang, Wei W wrote:
> On Friday, March 29, 2
On Tue, Apr 02, 2024 at 07:20:01AM +, Wang, Wei W wrote:
> > IIUC we still need that pre_7_2 stuff and keep the postponed connect() to
> > make sure the ordering is done properly. Wei, could you elaborate the patch
> > you mentioned? Maybe I missed some spots.
>
> Sure. I saw your patch (565
On 4/3/2024 5:39, Peter Xu wrote:>
> I'm not 100% sure such thing (no matter here or moved into it, which
> does look cleaner) would work for us.
>
> The problem is I still don't yet see an ordering restricted on top of
> (1)
> accept() happens, and (2) receive LISTEN cm
On Wed, Apr 03, 2024 at 04:35:35PM +0800, Wang, Lei wrote:
> We should change the following line from
>
> while (!qemu_sem_timedwait(&mis->postcopy_qemufile_dst_done, 100)) {
>
> to
>
> while (qemu_sem_timedwait(&mis->postcopy_qemufile_dst_done, 100)) {
Stupid me.. :( Thanks for fi
On Wednesday, April 3, 2024 10:42 PM, Peter Xu wrote:
> On Wed, Apr 03, 2024 at 04:35:35PM +0800, Wang, Lei wrote:
> > We should change the following line from
> >
> > while (!qemu_sem_timedwait(&mis->postcopy_qemufile_dst_done,
> 100)) {
> >
> > to
> >
> > while (qemu_sem_timedwait(&mis->p
On Wed, Apr 03, 2024 at 04:04:21PM +, Wang, Wei W wrote:
> On Wednesday, April 3, 2024 10:42 PM, Peter Xu wrote:
> > On Wed, Apr 03, 2024 at 04:35:35PM +0800, Wang, Lei wrote:
> > > We should change the following line from
> > >
> > > while (!qemu_sem_timedwait(&mis->postcopy_qemufile_dst_don
On Thursday, April 4, 2024 12:34 AM, Peter Xu wrote:
> On Wed, Apr 03, 2024 at 04:04:21PM +, Wang, Wei W wrote:
> > On Wednesday, April 3, 2024 10:42 PM, Peter Xu wrote:
> > > On Wed, Apr 03, 2024 at 04:35:35PM +0800, Wang, Lei wrote:
> > > > We should change the following line from
> > >
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