On Wed, Aug 14, 2013 at 10:43 AM, Spensky, Chad - 0559 - MITLL <chad.spensky@xxxxxxxxxx> wrote: > Wolf, > > We're able to get all of the meta data just fine. I assume by meta-data you mean (essentially) "function" call parameters within QEMU as to the (1) location of the write on disk, and (2) the amount of data being written out (in bytes). > However it seems that > the actual content of the read/write seems to be wrong some of the time. That's very odd, I'm pretty sure I never had that bug (although I might silently have it!). I did occasionally observe a kernel accidentally writing out kernel buffers that hadn't been cleared to disk (guest kernel) :-) > The first 2 sectors seem to always be correct, however on some writes, the > data that we traced does not match up with the data we are actually seeing > in the .img file for the guest on disk. Are you certain you're getting every write? Sometimes things might be written to rapidly in succession? How are you obtaining the shadow copy of the write stream (maybe there was earlier stuff in this thread I should read up on)? -- Wolf -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
