pvresize hangs after resizing partition with fdisk

Issue

• Extended the size of a partition by using fdisk to delete the partition and then created a new larger one in it's place.
• After that a pvresize command is stuck with the following message:

2014-11-05T07:38:41.316240+00:00 kernel: INFO: task pvresize:1233 blocked for more than 120 seconds.
2014-11-05T07:38:41.316306+00:00 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
2014-11-05T07:38:41.316615+00:00 kernel: pvresize      D ffffffff80156347     0  1233  21844                     (NOTLB)
2014-11-05T07:38:41.316999+00:00 kernel: ffff810178dbdcb8 0000000000000086 0000000000000400 ffffffff8001c344
2014-11-05T07:38:41.317361+00:00 kernel: ffff810178dbdc98 0000000000000008 ffff81013b023860 ffff81083feac100
2014-11-05T07:38:41.317737+00:00 kernel: 0028d95f750a438f 00000000003e371a ffff81013b023a48 0000000700000000
2014-11-05T07:38:41.317744+00:00 kernel: Call Trace:
2014-11-05T07:38:41.318783+00:00 kernel: [<ffffffff8001c344>] generic_make_request+0x211/0x228
2014-11-05T07:38:41.327294+00:00 kernel: [<ffffffff8006ecd9>] do_gettimeofday+0x40/0x90
2014-11-05T07:38:41.327313+00:00 kernel: [<ffffffff800637de>] io_schedule+0x3f/0x67
2014-11-05T07:38:41.327666+00:00 kernel: [<ffffffff800f8e90>] __blockdev_direct_IO+0x8d5/0xa88
2014-11-05T07:38:41.328024+00:00 kernel: [<ffffffff800e93ae>] blkdev_direct_IO+0x32/0x37
2014-11-05T07:38:41.328391+00:00 kernel: [<ffffffff800e92e6>] blkdev_get_blocks+0x0/0x96
2014-11-05T07:38:41.328740+00:00 kernel: [<ffffffff8000c665>] __generic_file_aio_read+0xb8/0x198
2014-11-05T07:38:41.329089+00:00 kernel: [<ffffffff80063af9>] mutex_lock+0xd/0x1d
2014-11-05T07:38:41.329437+00:00 kernel: [<ffffffff800c9e56>] generic_file_read+0xac/0xc5
2014-11-05T07:38:41.329788+00:00 kernel: [<ffffffff800a3444>] autoremove_wake_function+0x0/0x2e
2014-11-05T07:38:41.330459+00:00 kernel: [<ffffffff800e83f9>] block_ioctl+0x1b/0x1f
2014-11-05T07:38:41.330473+00:00 kernel: [<ffffffff80041ea0>] do_ioctl+0x21/0x6b
2014-11-05T07:38:41.331162+00:00 kernel: [<ffffffff8002ff2d>] vfs_ioctl+0x457/0x4b9
2014-11-05T07:38:41.331176+00:00 kernel: [<ffffffff800ba703>] audit_syscall_entry+0x1a8/0x1d3
2014-11-05T07:38:41.331856+00:00 kernel: [<ffffffff8000b72f>] vfs_read+0xcb/0x171
2014-11-05T07:38:41.331868+00:00 kernel: [<ffffffff80011d49>] sys_read+0x45/0x6e
2014-11-05T07:38:41.332553+00:00 kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0