关于sys-fs/device-mapper的block

waterloo2005

1. 
   
2. bug -doc -policykit -test" 3,737 kB
   
3. [ebuild     U ] gnome-base/gnome-applets-2.28.0 [2.26.3-r1] USE="acpi gnome hal -apm -debug -doc -gstreamer -ipv6 -networkmanager -policykit" 9,375 kB
   
4. [ebuild     U ] mail-client/evolution-2.28.1 [2.26.3] USE="crypt dbus hal python ssl -exchange -gstreamer -kerberos -krb4 -ldap -mono -networkmanager -nntp -pda -profile (-debug%)" 29,032 kB
   
5. [blocks B     ] sys-fs/device-mapper ("sys-fs/device-mapper" is blocking sys-fs/udev-146-r1)
   
6. 
   
7. Total: 79 packages (73 upgrades, 6 new), Size of downloads: 198,336 kB
   
8. Conflict: 1 block (1 unsatisfied)
   
9. 
   
10. * Error: The above package list contains packages which cannot be
    
11. * installed at the same time on the same system.
    
12. 
    
13.   ('ebuild', '/', 'sys-fs/udev-146-r1', 'merge') pulled in by
    
14.     >=sys-fs/udev-096 required by ('installed', '/', 'net-wireless/iwl5000-ucode-8.24.2.12', 'nomerge')
    
15.     sys-fs/udev required by ('installed', '/', 'sys-kernel/gentoo-sources-2.6.30-r5', 'nomerge')
    
16.     >=sys-fs/udev-124 required by ('installed', '/', 'sys-fs/cryptsetup-1.0.6-r2', 'nomerge')
    
17.     (and 5 more)
    
18. 
    
19.   ('installed', '/', 'sys-fs/device-mapper-1.02.28', 'nomerge') pulled in by
    
20.     >=sys-fs/device-mapper-1.00.07-r1 required by ('installed', '/', 'sys-fs/cryptsetup-1.0.6-r2', 'nomerge')
    
21.     sys-fs/device-mapper required by world
    

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今天升级，发现这个block，我卸载了sys-fs/device-mapper和sys-fs/cryptsetup还是不行。
请问这是怎么回事？谢谢

waterloo2005

装lvm2代替sys-fs/device-mapper即可。