3 Apr
2017
3 Apr
'17
11:15 a.m.
On 04/03/2017 10:07 AM, Michael Hierweck wrote:
Hi all,
virsh checks whether a (live) migration is safe or unsafe. When a migration is considered to be unsafe it is rejected unless the --unsafe option is prodivided.
As a part of those checks virsh considers the cache settings for the underlying storage resources. In this context only cache="none" is considered to be safe.
I wonder why cache="directsync" might be harmfull as it bypasses the host page cache completely.
That's a good question. I too think it isn't harmful. Maybe it's a bug in our code? Michal