Re: synchronization of XFS

[Steve Lord <lord@xxxxxxx>]

Christoph Hellwig wrote:
> 
>>>Now if grub is opening the block device and reading out of that, it
>>>is looking at the same pages for metadata that xfs is looking at in
>>>memory. There is a bug where you can get corruption if you access
>>>the block device in parallel with the filesystem. Possibly this is
>>>behind the problem.
>>
>>This will cause an oops on 2.6.x won't it --- so I suspect if this is
>>behind the problem the report will be have been different.
> 
> 
> I don't think they're hitting the problem, the symptoms look very different.
> 

And thinking about it some more, having grub make the filesystem remount 
readonly would force everything down to disk unlike just doing a sync
call.

Steve