[libvirt] hash: failed on concurrent iterating.

[Zhangzijian]

> -----Original Message-----
> From: libvir-list-bounces at redhat.com [mailto:libvir-list-bounces at redhat.com]
> On Behalf Of Michal Privoznik
> Sent: Wednesday, April 04, 2018 5:21 PM
> To: zhangzijian (Cloud); libvir-list at redhat.com
> Cc: huangyong (Cloud)
> Subject: Re: [libvirt] hash: failed on concurrent iterating.
> 
> On 04/04/2018 11:10 AM, Zhangzijian wrote:
> > In function 'virHashForEach/virHashSearch', 'table->iterating' prevent
> concurrent iterating. But most caller evoke it, after hold a read lock.
> > This will lead the second caller failed to iterate the table. So, the caller should
> hold a write lock, then iterate the table.
> 
> Looks like there's another thread discussing this issue:
> 

Yes, the issue is still exist in v4.2.0.
Is it applicable to using write lock instead?

> https://www.redhat.com/archives/libvirt-users/2018-April/msg00004.html
> 
> Michal
> 
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