Bug 1299099 - systemd, kexec: Boot failure if kdump device unavailable
systemd, kexec: Boot failure if kdump device unavailable
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: kexec-tools (Show other bugs)
x86_64 Linux
high Severity medium
: rc
: 7.4
Assigned To: kdump team
Qiao Zhao
: OtherQA
Depends On:
Blocks: 1366034
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Reported: 2016-01-15 18:08 EST by George Beshers
Modified: 2016-09-29 12:27 EDT (History)
11 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-09-29 12:27:13 EDT
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Description George Beshers 2016-01-15 18:08:15 EST
Description of problem:

    We have observed that when kdump is pointed at non-root disk drive
    and later that drive is removed the kernel won't complete booting.
    [Non-root because it was on a 32TB machine and there wasn't enough
     space on the root drive.)

Version-Release number of selected component (if applicable):

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Comment 2 Dave Young 2016-01-19 01:51:06 EST

System does not boot means the normal kernel can not boot?

Have you add it to /etc/fstab or somewhere else? I guess systemd is waiting for the mount happens and timeout, is this your case and do you have a console log?

Comment 3 George Beshers 2016-01-27 14:27:35 EST
Sorry to say that the log got deleted in a cleanup sweep.
I will work on reproducing this and provide a log.

However, the kernel booted and was doing systemd-udevd stuff
and my memory is that it was hung trying to start kdump.
That said, I've seen kdump fail to start many times without
causing the boot to hang (we get to login); so I am begining
to suspect myself of user error.
Comment 4 Russ Anderson 2016-09-22 15:22:51 EDT
Update fields so properly tracked.
Comment 5 Russ Anderson 2016-09-22 15:24:46 EDT
Not a showstopper for 7.3.
Needs additional information from George.
Comment 6 George Beshers 2016-09-29 12:27:13 EDT
Tested this with snap3 and its no longer an issue.

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