Re: [Xen-users] SSD 4K Alignment?

[Jan-Aage Frydenbø-Bruvoll <jan@xxxxxxxxxxxxx>]

Hi Adam,

> Not sure exactly what Linux kernel version is used on XCP, or what disks/etc 
> you were using,
> but I can confirm that there was definitely a bug in Linux 2.6 from Debian 
> Squeeze which seriously 
> affected SSD performance (ie, reduced it to worse that HDD speed), which was 
> fixed by upgrading
> to debian squeeze backports kernel 3.0.0 I think from memory.

Now that's interesting. The last kernel we tested on our XCP rig was 2.6.39, 
which still had the problem. You wouldn't happen to have an idea whether the 
same bug was present in other kernels as well?

Best regards
Jan



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