Hi Martin,
〉But once
you start merging, you'd rather be prepared for
〉several
events for the same phys device, too.
We can base on such a threshold
that there is no repeat uevents from the same sd device,
otherwise, we pause doing merger,
and kick uevent processing thread
to process the merged uevents.
Regards,
Tang
发件人:
Martin Wilck
<mwilck@suse.com>
收件人:
tang.junhui@zte.com.cn,
抄送:
dm-devel@redhat.com
日期:
2016/11/18
16:38
主题:
Re: [dm-devel]
Improve processing efficiency for addition and deletion of multipath devices
发件人:
dm-devel-bounces@redhat.com
On Fri, 2016-11-18 at 16:24 +0800, tang.junhui@zte.com.cn
wrote:
> Hi Martin,
>
> In your case, my action is:
> 1) merger uevents 1) 2) to one uevent "add sda sdb", and
process them
> togother
This will fail because sdb is non-existent at the time you try - no?
> Though the processing efficiency in such scenario is lower than
> yours, but it is simple and reliable,
> more importantly, Martin, you still focus on such special scene,
> which I concerned is like this:
[...]
I understand what you're concerned with. I just think we need to do
both. I agree that many events for many different devices are more
likely. But once you start merging, you'd rather be prepared for
several events for the same phys device, too.
Martin
--
Dr. Martin Wilck <mwilck@suse.com>, Tel. +49 (0)911 74053 2107
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
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