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mkdumprd: use --quiet dracut argument to speedup initramfs build 

Currently in Fedora/RedHat dracut installs its fedora.conf.example
as the default config file, in which sysloglvl is set 5. This leads
to maxloglvl=5 in dracut calls, making unnecessary lsinitrd calls
during initramfs builds by kdump.

This patch makes use of
https://github.com/dracutdevs/dracut/pull/272
and disables lsinitrd logging by giving "-q" option to dracut,
eliminating unnecessary lsinitrd calls in dracut.

1) Before this patch
$ kdumpctl stop; touch /etc/kdump.conf; time kdumpctl start
kexec: unloaded kdump kernel
Stopping kdump: [OK]
Detected change(s) in the following file(s):
  /etc/kdump.conf
Rebuilding /boot/initramfs-4.13.0-0.rc1.git4.1.fc27.x86_64kdump.img
kexec: loaded kdump kernel
Starting kdump: [OK]
real    0m26.824s
user    0m9.958s
sys     0m15.106s

2) After this patch
$ kdumpctl stop; touch /etc/kdump.conf; time kdumpctl start
kexec: unloaded kdump kernel
Stopping kdump: [OK]
Detected change(s) in the following file(s):
  /etc/kdump.conf
Rebuilding /boot/initramfs-4.13.0-0.rc1.git4.1.fc27.x86_64kdump.img
kexec: loaded kdump kernel
Starting kdump: [OK]
real    0m20.420s
user    0m8.385s
sys     0m10.468s

[dyoung]:
- rewrite patch subject

Signed-off-by: Ziyue Yang <ziyang@redhat.com>
Reviewed-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This commit is contained in:
Dave Young 2017-09-06 15:25:59 +08:00
parent 75ab9ee26a
commit 69ba16a409
1 changed files with 1 additions and 1 deletions
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mkdumprd
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@ -37,7 +37,7 @@ is_wdt_addition_needed
[[ $? -eq 0 ]] && WDTCFG="-a watchdog"
extra_modules=""
dracut_args=("--hostonly" "--hostonly-cmdline" "--hostonly-i18n" "-o" "plymouth dash resume ifcfg" $WDTCFG)
dracut_args=("--quiet" "--hostonly" "--hostonly-cmdline" "--hostonly-i18n" "-o" "plymouth dash resume ifcfg" $WDTCFG)
OVERRIDE_RESETTABLE=0
add_dracut_arg() {