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kexec-tools.spec: removes kexec udev rules for s390

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Currenty the kexec-tools package contains udev rules for kdump
that reload kdump in case of memory or CPU hotplug:

$ cat /etc/udev/rules.d/98-kexec.rules
SUBSYSTESUBSYSTEM=="cpu", ACTION=="online", PROGRAM="/bin/systemctl try-restart kdump.service"
SUBSYSTEM=="cpu", ACTION=="offline", PROGRAM="/bin/systemctl try-restart kdump.service"
SUBSYSTEM=="memory", ACTION=="add", PROGRAM="/bin/systemctl try-restart kdump.service"
SUBSYSTEM=="memory", ACTION=="remove", PROGRAM="/bin/systemctl try-restart kdump.service"

On other architectures the rules are necessary because the memory
and CPU layout stored in the kdump in-memory ELF header at kdump
load time. Therefore the kdump kernel has to be reloaded each
time when the CPU or memory configuration changes.

This has drawbacks:

1. During kdump reload the system can't be dumped.
2. On systems with many hotplug events (e.g. on s390 with cpuplugd)
this creates significant overhead

The reload is not necessary on s390 because there the ELF header is
created in the 2nd (kdump) kernel. Therefore, to improve things,
remove the rules for s390.

Log is from IBM, and patch has been tested by IBM and work well.

Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
Baoquan He 2013-05-30 10:33:57 +08:00
parent 9e964ff4c6
commit 5f6dfdf8db
1 changed files with 6 additions and 0 deletions
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6
kexec-tools.spec
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@ -164,7 +164,11 @@ install -m 644 %{SOURCE8} $RPM_BUILD_ROOT%{_sysconfdir}/kdump.conf
install -m 644 kexec/kexec.8 $RPM_BUILD_ROOT%{_mandir}/man8/kexec.8
install -m 755 %{SOURCE11} $RPM_BUILD_ROOT%{_datadir}/kdump/firstboot_kdump.py
install -m 644 %{SOURCE12} $RPM_BUILD_ROOT%{_mandir}/man8/mkdumprd.8
%ifnarch s390x
# For s390x the ELF header is created in the kdump kernel and therefore kexec
# udev rules are not required
install -m 644 %{SOURCE14} $RPM_BUILD_ROOT%{_sysconfdir}/udev/rules.d/98-kexec.rules
%endif
install -m 644 %{SOURCE15} $RPM_BUILD_ROOT%{_mandir}/man5/kdump.conf.5
install -m 644 %{SOURCE16} $RPM_BUILD_ROOT%{_unitdir}/kdump.service
mkdir -p $RPM_BUILD_ROOT/usr/sbin
@ -300,7 +304,9 @@ done
%{_datadir}/kdump
%config(noreplace,missingok) %{_sysconfdir}/sysconfig/kdump
%config(noreplace,missingok) %{_sysconfdir}/kdump.conf
%ifnarch s390x
%config %{_sysconfdir}/udev/rules.d/*
%endif
%{dracutlibdir}/modules.d/*
%dir %{_localstatedir}/crash
%{_mandir}/man8/*