Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT)

[Laurent Vivier]

Le mardi 20 mai 2008 à 23:52 +0100, Paul Brook a écrit :
> > When sector-aligned guest offsets are converted to sector-unaligned
> > writes (e.g. due to qcow2 etc.), that property is no longer satisfied,
> > and power failure of the host disk can cause more damage than the
> > guest is designed to be resistant to.
> 
> Seems like the easiest solution would be to have qcow always align its writes.
> We don't do on the fly compression, so it should be fairly easy to make this 
> happen with minimal overhead.

I did the patch you describe and post it to the mailing list on Tue, 22
Jan 2008 11:17:09 +0100, it was called 
"[PATCH] snapshot=on and cache=off compatibility"
but was never commented.

Regards,
Laurent
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