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Blacklist floppy module to speed up boot by several seconds.

Browse source 
Add UpdateInitramfs task which is needed for this to take effect.
Enable both tasks for GCE.

Console output before
=====================
[    1.877142] sd 0:0:1:0: [sda] Attached SCSI disk
[    1.880163] sd 0:0:1:0: Attached scsi generic sg0 type 0
[    2.684132] tsc: Refined TSC clocksource calibration: 2500.000 MHz
[    4.824081] floppy0: no floppy controllers found
[    5.103671] work still pending
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Running /scripts/local-premount ... done.
[    5.313107] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
...
[    7.751955] alg: No test for crc32 (crc32-pclmul)
[   10.728078] floppy0: no floppy controllers found
[   11.006680] work still pending
[....] Activating swap... done
[   11.258954] EXT4-fs (sda1): re-mounted. Opts: (null)

Console output after
====================
[    1.829785] sd 0:0:1:0: [sda] Attached SCSI disk
[    1.832806] sd 0:0:1:0: Attached scsi generic sg0 type 0
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Running /scripts/local-premount ... done.
[    1.969862] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
...
[    2.878920] alg: No test for crc32 (crc32-pclmul)
[....] Activating swap... done
[    2.986642] EXT4-fs (sda1): re-mounted. Opts: (null)

Delint.

Delint
This commit is contained in:
Brian Mattern 2015-01-24 08:17:34 +00:00 • committed by Brian Mattern
parent 1ecc7df1d9
commit 4bd71a2dbe
2 changed files with 17 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
bootstrapvz/common/tasks/boot.py
View file

@ -7,16 +7,28 @@ from bootstrapvz.base.fs import partitionmaps
import os.path import os.path
class UpdateInitramfs(Task):
description = 'Updating initramfs'
phase = phases.system_modification
@classmethod
def run(cls, info):
from ..tools import log_check_call
log_check_call(['chroot', info.root, 'update-initramfs', '-u'])
class BlackListModules(Task): class BlackListModules(Task):
description = 'Blacklisting kernel modules' description = 'Blacklisting kernel modules'
phase = phases.system_modification phase = phases.system_modification
successors = [UpdateInitramfs]
@classmethod @classmethod
def run(cls, info): def run(cls, info):
blacklist_path = os.path.join(info.root, 'etc/modprobe.d/blacklist.conf') blacklist_path = os.path.join(info.root, 'etc/modprobe.d/blacklist.conf')
with open(blacklist_path, 'a') as blacklist: with open(blacklist_path, 'a') as blacklist:
blacklist.write(('# disable pc speaker\n' blacklist.write(('# disable pc speaker and floppy\n'
'blacklist pcspkr')) 'blacklist pcspkr\n'
'blacklist floppy\n'))
class DisableGetTTYs(Task): class DisableGetTTYs(Task):

3
bootstrapvz/providers/gce/__init__.py
View file

@ -7,6 +7,7 @@ import tasks.initd
import tasks.host import tasks.host
import tasks.packages import tasks.packages
from bootstrapvz.common.tasks import apt from bootstrapvz.common.tasks import apt
from bootstrapvz.common.tasks import boot
from bootstrapvz.common.tasks import loopback from bootstrapvz.common.tasks import loopback
from bootstrapvz.common.tasks import initd from bootstrapvz.common.tasks import initd
from bootstrapvz.common.tasks import ssh from bootstrapvz.common.tasks import ssh
@ -43,6 +44,8 @@ def resolve_tasks(taskset, manifest):
initd.AddExpandRoot, initd.AddExpandRoot,
tasks.initd.AdjustExpandRootDev, tasks.initd.AdjustExpandRootDev,
initd.InstallInitScripts, initd.InstallInitScripts,
boot.BlackListModules,
boot.UpdateInitramfs,
ssh.AddSSHKeyGeneration, ssh.AddSSHKeyGeneration,
ssh.DisableSSHPasswordAuthentication, ssh.DisableSSHPasswordAuthentication,
tasks.apt.CleanGoogleRepositoriesAndKeys, tasks.apt.CleanGoogleRepositoriesAndKeys,