Messages in this thread | | | Date | Wed, 03 Apr 2013 11:41:17 -0400 | From | Phillip Susi <> | Subject | Re: Loopback device hung [was Re: xfs deadlock on 3.9-rc5 running xfstests case #78] |
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On 4/3/2013 7:41 AM, Jens Axboe wrote: >> Thanks for testing! I don't particularly like this stuff in >> loop, though. It's quite nasty and depends on other behaviour. It >> would be prettier if we just had rescan_partitions() do the right >> thing, and only drop partitions and not rescan if NO_PART_SCAN is >> set. >> >> Ala the below, dropping the loop change and implementing that >> change in the core code. Phillip, can you check whether this does >> the right thing for your bug too? > > Phillip? I'm going to revert the loop change asap, so if you want > this fixed for 3.10, it's about that time to test it out.
I have not tested it yet, but I am pretty sure it won't work. It looks like the patch changes the BLKRRPART path to go ahead and remove existing partitions when GENHD_FL_NO_PARTSCAN is set. loop doesn't issue the BLKRRPART ioctl when !LO_FLAGS_PARTSCAN so this won't help. I think loop needs to set GENHD_FL_NO_PARTSCAN and then issue the ioctl regardless of the LO_FLAGS_PARTSCAN flag to get the partitions to be removed. I will try to test tonight.
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