Re: [libvirt] hash: failed on concurrent iterating.
On 04/04/2018 11:50 AM, Zhangzijian wrote:
> -----Original Message-----
> From: libvir-list-bounces(a)redhat.com [mailto:libvir-list-bounces@redhat.com]
> On Behalf Of Michal Privoznik
> Sent: Wednesday, April 04, 2018 5:21 PM
> To: zhangzijian (Cloud); libvir-list(a)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?
Do you have a stack trace to share?
Michal