Re: [Xen-devel] bug when using 4K sectors?

[Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>]

> > So knowing the block size isn't the whole story.
> > 
> 
> Are you saying that Xen and/or Linux needs to worry about a user setting up a 
> poorly aligned filesystem to pass to a VM? Seems simpler just to set things 
> up right in the first place.

That assumes things like a file system and the existing layout being
correct. Plus you also have to set the thing up which means you have to
know about such stuff.

For file systems Linux itself does indeed take the approach of "so
partition sensibly" because in the fs case it's really hard if not
impossible to do a good job any other way.

For raw devices and things like databases wanting atomicity of block
writes however its quite different and you need to be aware of the
alignments.

Alan

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