ALT Linux Bugzilla – #14345
very long pause with clocksource=tsc after checking the root fs
Last modified: 2010-08-25 08:48:10
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I discovered this while experimenting because of the bug with system clock
The described effect appears together with a similar effect:
$ rpm -q kernel-image-wks-smp-2.6.18-alt1 -i
Name : kernel-image-wks-smp Relocations: (not relocateable)
Version : 2.6.18 Vendor: ALT Linux Team
Release : alt1 Build Date: Срд 13 Дек 2006 02:28:15
Install date: Срд 21 Фев 2007 02:43:51 Build Host: bee5.hasher.altlinux.org
Group : System/Kernel and hardware Source RPM:
Size : 44948311 License: GPL
Packager : Konstantin A. Lepikhov <firstname.lastname@example.org>
Steps to Reproduce:
1. boot 2.6.24-wks-smp-alt1 with clocksource=tsc
After the root fs is mounted read-only (and it is written that it has been
checked), the boot-up sequence pauses for about 40 sec. Only after that the
message like "Remounting the root filesystem read-write" is written.
Normally, there is no pause at all at this moment (e.g., on 2.6.24-wks-smp-alt1
with default options).
(In reply to comment #0)
> After the root fs is mounted read-only (and it is written that it has been
I meant after it was checked while being read-only; before remounting it in
I also experienced this delay on 2.6.24-std-def-alt2 with clocksource=tsc.
(With this option, 2.6.24-std-def-alt2 also has the bad behavior of the system
clock: https://bugzilla.altlinux.org/show_bug.cgi?id=14258#c18 ).
Perhaps, this is not a bug and an expected behavior under this kernel parameter.
But I wonder why other programs work without delays then.
Ivan, is it still there?