>>>>> "Nick" == Nick Piggin <npiggin@xxxxxxx> writes: Nick> Also I don't think we can deal with memory errors and scribbles Nick> just by crcing dirty data. The calculations generating the data Nick> could get corrupted. Yep, the goal is to make the window as small as possible. Nick> Data can be corrupted on its way back from the device to Nick> userspace. We also get a CRC back from the storage. So the (integrity-aware) application is also able to check on read. Nick> Obviously this feature is being pushed by databases and such that Nick> really want to pass checksums all the way from userspace. Block Nick> retrying is _not_ needed or wanted here of course. Nope. The integrity error is bubbled all the way up to the database and we can decide to retry, recreate or error out depending on what we find when we do validation checks on the data buffer and the integrity metadata. -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
