Comment 3 for bug 780266

A trigger of this is inserting my Sandisk Cruzer USB memory stick with fake integrated CD-ROM.

This it dmesg when I insert the USB memory stick:
May 12 14:46:20 sojo kernel: [95455.488104] usb 1-3: new high speed USB device using ehci_hcd and address 12
May 12 14:46:20 sojo kernel: [95455.622507] scsi9 : usb-storage 1-3:1.0
May 12 14:46:21 sojo kernel: [95456.623418] scsi 9:0:0:0: Direct-Access SanDisk Cruzer 7.01 PQ: 0 ANSI: 0 CCS
May 12 14:46:21 sojo kernel: [95456.623973] scsi 9:0:0:1: CD-ROM SanDisk Cruzer 7.01 PQ: 0 ANSI: 0
May 12 14:46:21 sojo kernel: [95456.629231] sd 9:0:0:0: Attached scsi generic sg4 type 0
May 12 14:46:21 sojo kernel: [95456.635576] sd 9:0:0:0: [sdd] Attached SCSI removable disk
May 12 14:46:21 sojo kernel: [95456.645776] sr1: scsi3-mmc drive: 48x/48x tray
May 12 14:46:21 sojo kernel: [95456.645996] sr 9:0:0:1: Attached scsi CD-ROM sr1
May 12 14:46:21 sojo kernel: [95456.646558] sr 9:0:0:1: Attached scsi generic sg5 type 5
May 12 14:46:22 sojo kernel: [95457.352760] sd 9:0:0:0: [sdd] 31306239 512-byte logical blocks: (16.0 GB/14.9 GiB)
May 12 14:46:22 sojo kernel: [95457.354199] sd 9:0:0:0: [sdd] Asking for cache data failed
May 12 14:46:22 sojo kernel: [95457.354203] sd 9:0:0:0: [sdd] Assuming drive cache: write through
May 12 14:46:22 sojo kernel: [95457.358186] sd 9:0:0:0: [sdd] Asking for cache data failed
May 12 14:46:22 sojo kernel: [95457.358190] sd 9:0:0:0: [sdd] Assuming drive cache: write through
May 12 14:46:22 sojo kernel: [95457.358870] sdd: sdd1
May 12 14:46:23 sojo kernel: [95458.609921] ISO 9660 Extensions: Microsoft Joliet Level 3
May 12 14:46:24 sojo kernel: [95458.686421] ISOFS: changing to secondary root
May 12 14:46:24 sojo kernel: [95458.693931] VFS: busy inodes on changed media or resized disk sr1

Until I remove my SUB stick I get this in syslog repeatedly:
May 12 14:51:47 sojo kernel: [95782.079217] VFS: busy inodes on changed media or resized disk sr1
May 12 14:51:47 sojo kernel: [95782.095640] VFS: busy inodes on changed media or resized disk sr1
May 12 14:51:47 sojo kernel: [95782.112794] VFS: busy inodes on changed media or resized disk sr1
May 12 14:51:47 sojo kernel: [95782.146326] VFS: busy inodes on changed media or resized disk sr1
May 12 14:51:47 sojo kernel: [95782.162621] VFS: busy inodes on changed media or resized disk sr1
May 12 14:51:47 sojo kernel: [95782.179708] VFS: busy inodes on changed media or resized disk sr1
May 12 14:51:47 sojo kernel: [95782.250378] VFS: busy inodes on changed media or resized disk sr1

But the CPU usage does not go away when I remove it, but udisks-daemon and dbys-daemon also take a lot of CPU.