On Mon, Jan 23, 2017 at 1:17 PM, Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxxxxxxx> wrote: > Hello Dan, > > Am Freitag, 6. Januar 2017, 17:02:51 BRST schrieb Dan Williams: >> v1 of these changes [1] was a one line change to bdev_get_queue() to >> prevent a shutdown crash when del_gendisk() races the final >> __blkdev_put(). >> >> While it is known at del_gendisk() time that the queue is still alive, >> Jan Kara points to other paths [2] that are racing __blkdev_put() where >> the assumption that ->bd_queue, or inode->i_wb is valid does not hold. >> >> Fix that broken assumption, make it the case that if you have a live >> block_device, or block_device-inode that the corresponding queue and >> inode-write-back data is still valid. >> >> These changes survive a run of the libnvdimm unit test suite which puts >> some stress on the block_device shutdown path. > > I realize that the kernel test robot found problems with this series, but FWIW > it fixes the bug mentioned in [2]. > Thanks for the test result. I might take a look at cleaning up the test robot reports and resubmitting this approach unless Jan beats me to the punch with his backing_devi_info lifetime change patches. >> [2]: http://www.spinics.net/lists/linux-fsdevel/msg105153.html -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
