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stec-inc / EnhanceIO

EnhanceIO Open Source for Linux
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Anyone had a problem with EnhanceIO over LVM? #117

Open rezass opened 8 years ago

rezass commented 8 years ago

In eio_conf.c file there is a comment which makes me worried about using LVM for caching device. Anyone experienced any problems due to the priority of reboot notifiers? Is using EIO over LVM safe?

/*
 * The notifiers are registered in descending order of priority and
 * executed in descending order or priority. We should be run before
 * any notifiers of ssd's or other block devices. Typically, devices
 * use a priority of 0.
 * XXX - If in the future we happen to use a md device as the cache
 * block device, we have a problem because md uses a priority of
 * INT_MAX as well. But we want to run before the md's reboot notifier !
 */
pemer commented 8 years ago

Hi, currently you get problems if you install a Windows system on KVM in a LVM Image. NTFS gets 100% an error if write-back is set and the windows system drops strange error messages.