>>>>> "James" == James Bottomley <James.Bottomley@xxxxxxx> writes: James> Would it be too much work in the fs to mark the page dirty before James> you begin altering it (and again after you finish, just in case James> some cleaner noticed and initiated a write)? Or some other flag James> that indicates page under modification? All the process James> controlling the writeout (which is pretty high up in the stack) James> needs to know is if we triggered the check error by altering the James> page while it was in flight. James> I agree that a block based retry would close all the holes ... it James> just doesn't look elegant to me that the fs will already be James> repeating the I/O if it changed the page and so will block. I experimented with this approach a while back. However, I quickly got into a situation where frequently updated blocks never made it to disk because the page was constantly being updated. And all writes failed with a guard tag error. -- 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
