• Daniel P. Berrange's avatar
    md: don't delay reboot by 1 second if no MD devices exist · 2dba6a91
    Daniel P. Berrange authored
    The md_notify_reboot() method includes a call to mdelay(1000),
    to deal with "exotic SCSI devices" which are too volatile on
    reboot. The delay is unconditional. Even if the machine does
    not have any block devices, let alone MD devices, the kernel
    shutdown sequence is slowed down.
    
    1 second does not matter much with physical hardware, but with
    certain virtualization use cases any wasted time in the bootup
    & shutdown sequence counts for alot.
    
    * drivers/md/md.c: md_notify_reboot() - only impose a delay if
      there was at least one MD device to be stopped during reboot
    Signed-off-by: default avatarDaniel P. Berrange <berrange@redhat.com>
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
    2dba6a91
md.c 212 KB