On 04/23/2012 12:44 PM, Stefan Gourguis wrote: > Hello List, > > i have a Question about SSD and Trim on Lio-Target > > 1. I format my ssd with ext4 and mount it with the discard option > 2. i create a fileio backstor on this partition > 3. i serve this to an host via lio qla2xx target module > 4. The Host format this Target writeing some files on it and then delete it > 5. Will the Trim Command on the ext4 partition occur when the files > are deleted in the fileio container file ? 1) Host needs to also be configured to issue discards 2) Linux needs a kernel API in the block layer to reissue discards. This is coming soon, see Martin Petersen's "write same support v4" thread on linux-scsi. 3) LIO needs to use the API. Nick has indicated this is a high priority once the underlying kernel support is there. HTH -- Regards -- Andy -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
