On Fri, Jan 13, 2017 at 06:16:02AM +0000, Dexuan Cui wrote: > IMO this means not only SCSI Unmap command is affected, but > some other SCSI commands can be affected too? > And it looks the bare metal can be affected too? This affects all drivers looking at the sdb.length field for the total I/O length - many drivers don't need it but just the SGL, including both that I tested d this change on - one being virtualized and one bare metal. It also only affects commands where the data transfer length is different from the length of the written blocks, so only affects WRITE SAME and UNMAP commands, used for discard or zeroing. I'll submit a cleaned up version with a proper block layer helper today. Thanks for reporting and debugging this issue! -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
