git: 45a1044a53a1 - Create tag zfs-0.5.2

The annotated tag zfs-0.5.2 has been created by allanjude:

URL: https://cgit.FreeBSD.org/src/tag/?h=zfs-0.5.2

tag zfs-0.5.2
Tagger:     Brian Behlendorf <behlendorf1@llnl.gov>
TaggerDate: 2010-11-12 21:57:17 +0000

ZFS Version 0.5.2
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iEYEABECAAYFAkzduD0ACgkQCrnpkcavZYsC4QCfQkan1399tvn6qqRtJ9q9RTSp
63IAoNleFR15qrTtMLxWWu3UQnHdXQS9
=U6HP
-----END PGP SIGNATURE-----

commit 5e7affae52365f9f329cc63a53ae570352c4d993
Author:     Brian Behlendorf <behlendorf1@llnl.gov>
AuthorDate: 2010-11-12 17:33:17 +0000
Commit:     Brian Behlendorf <behlendorf1@llnl.gov>
CommitDate: 2010-11-12 17:33:17 +0000

    Skip /dev/hpet during 'zpool import'
    
    If libblkid does not contain ZFS support, then 'zpool import' will scan
    all block devices in /dev/ to determine which ones are components of a
    ZFS filesystem.  It does this by opening all the devices and stat'ing
    them to determine which ones are block devices.  If the device turns
    out not to be a block device it is skipped.
    
    Usually, this whole process is pretty harmless (although slow).  But
    there are certain devices in /dev/ which must be handled in a very
    specific way or your system may crash.  For example, if /dev/watchdog
    is simply opened the watchdog timer will be started and your system
    will panic when the timer expires.
    
    It turns out the /dev/hpet causes similiar problems although only when
    accessed under a virtual machine.  For some reason accessing /dev/hpet
    causes qemu to crash.  To address this issue this commit adds /dev/hpet
    to the device blacklist, it will be skipped solely based on its name.