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Bhupesh Sharma 5221d4b90c kdumpctl: Remove 'netroot' and 'iscsi initiator' entries from kdump cmdline 
In a iSCSI multipath environment (which uses iSCSI software initiator
and target environment) when the vmcore file is saved on the target,
kdump always fails to establish a iSCSI session and also fails to
collect dump due to duplicate entries for 'netroot' and
'iscsi initiator' in the kdump bootargs:

   # echo c > /proc/sysrq-trigger

   [83471.842707] SysRq : Trigger a crash
   [83471.843233] BUG: unable to handle kernel NULL pointer dereference at           (null)
   [83471.844155] IP: [<ffffffffac82ed16>] sysrq_handle_crash+0x16/0x20
   [83471.844931] PGD 800000023f710067 PUD 229fd6067 PMD 0
   [83471.845655] Oops: 0002 [#1] SMP

   <snip..>

   [83471.861889] Call Trace:
   [83471.862162]  [<ffffffffac82f53d>] __handle_sysrq+0x10d/0x170
   [83471.862771]  [<ffffffffac82f9af>] write_sysrq_trigger+0x2f/0x40
   [83471.863405]  [<ffffffffac690630>] proc_reg_write+0x40/0x80
   [83471.863984]  [<ffffffffac61acd0>] vfs_write+0xc0/0x1f0
   [83471.864536]  [<ffffffffac61baff>] SyS_write+0x7f/0xf0
   [83471.865075]  [<ffffffffacb1f7d5>] system_call_fastpath+0x1c/0x21
   [83471.865714] Code: eb 9b 45 01 f4 45 39 65 34 75 e5 4c 89 ef e8 e2 f7 ff ff eb db 0f 1f 44 00 00 55 48 89 e5 c7 05 41 47 81 00 01 00 00 00 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 0f 1f 44 00 00 55 31 c0 c7 05 be
   [83471.868888] RIP  [<ffffffffac82ed16>] sysrq_handle_crash+0x16/0x20
   [83471.869700]  RSP <ffff9e7fe77b7e58>
   [83471.870074] CR2: 0000000000000000

   <snip..>

            Starting Login iSCSI Target iqn.2014-08.com.example:t1...
   [  OK  ] Stopped Login iSCSI Target iqn.2014-08.com.example:t1.
            Starting Login iSCSI Target iqn.2014-08.com.example:t1...
   [    6.607051] scsi host2: iSCSI Initiator over TCP/IP
   [FAILED] Failed to start Login iSCSI Target iqn.2014-08.com.example:t1.
   See 'systemctl status "iscsistart_\\x40...com.example:t1.service"' for details.
   [  126.572911] dracut-initqueue[243]: Warning: dracut-initqueue timeout - starting timeout scripts
            Stopping Open-iSCSI...
   [  OK  ] Stopped Open-iSCSI.
            Starting Open-iSCSI...
   [  OK  ] Started Open-iSCSI.
            Starting Login iSCSI Target iqn.2014-08.com.example:t1...
   [  OK  ] Stopped Login iSCSI Target iqn.2014-08.com.example:t1.
            Starting Login iSCSI Target iqn.2014-08.com.example:t1...
   [  131.095897] scsi host3: iSCSI Initiator over TCP/IP
   [FAILED] Failed to start Login iSCSI Target iqn.2014-08.com.example:t1.
   See 'systemctl status "iscsistart_\\x40...com.example:t1.service"' for details.
   [  251.085029] dracut-initqueue[243]: Warning: dracut-initqueue timeout - starting timeout scripts
   [  251.594554] dracut-initqueue[243]: Warning: dracut-initqueue timeout - starting timeout scripts

   <snip..>

This patch fixes the same by removing the 'netroot',
'rd.iscsi.initiator' and 'iscsi_initiator' entries from the kdump boot
cmdline.

One reason why this is safe is our kdump target setup does not
depend on 1st kernel inherited cmdline params now since the work
we dropped root dependency.

Signed-off-by: Bhupesh Sharma <bhsharma@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
2018-05-21 14:09:17 +08:00
anaconda-addon Rename the subpackage kdump-anaconda-addon 2014-05-22 18:32:43 +08:00
.gitignore .gitignore: Update to make it more generic 2016-05-16 10:15:01 +08:00
98-kexec.rules Revert "Improve 'cpu add' udev rules" 2017-08-17 16:42:11 +08:00
dracut-kdump-capture.service Introduce kdump capture service 2014-08-05 13:13:32 +08:00
dracut-kdump-emergency.service kdump-emergency: fix "Transaction is destructive" emergency failure 2017-03-31 11:54:30 +08:00
dracut-kdump-emergency.target kdump-emergency: fix "Transaction is destructive" emergency failure 2017-03-31 11:54:30 +08:00
dracut-kdump-error-handler.service Introduce kdump error handling service 2014-08-05 13:13:32 +08:00
dracut-kdump-error-handler.sh Revert "execute kdump_post after do_default_action" 2015-04-08 15:50:16 +08:00
dracut-kdump.sh dracut-kdump: use POSIX shell syntax 2016-11-28 10:41:15 +08:00
dracut-module-setup.sh Revert "dracut-module-setup.sh: pass correct ip= param for ipv6" 2018-05-09 14:21:51 +08:00
dracut-monitor_dd_progress monitor-dd-progress fix 2013-06-25 16:45:59 +08:00
fadump-howto.txt Document: fix incorrect link in fadump-how.txt 2017-03-08 13:07:20 +08:00
kdump-dep-generator.sh kdump-dep-generator: Add kdump service dependencies on the fly 2014-04-17 11:27:31 +08:00
kdump-in-cluster-environment.txt Add fence_kdump support for generic clusters 2014-04-03 14:43:06 +08:00
kdump-lib-initramfs.sh kdump-lib-initramfs.sh: ignore the failure of echo 2017-04-27 13:59:49 +08:00
kdump-lib.sh Revert "dracut-module-setup.sh: pass correct ip= param for ipv6" 2018-05-09 14:21:51 +08:00
kdump.conf kdumpctl: for fence_kdump, the ipaddr of this node should be excluded from list 2017-05-18 16:44:42 +08:00
kdump.conf.5 kdump.conf.5: clarify the fence_kdump_nodes option 2017-06-09 09:47:22 +08:00
kdump.service make kdump work when kernel crash after shutdown 2015-06-03 21:10:34 +08:00
kdump.sysconfig Remove kernel param "quiet" from kdump kernel cmdline 2015-12-11 15:18:31 +08:00
kdump.sysconfig.i386 Remove kernel param "quiet" from kdump kernel cmdline 2015-12-11 15:18:31 +08:00
kdump.sysconfig.ppc64 kdump.sysconfig.ppc64(le): remove "root=" param from ppc64(le) 2nd kernel's command line 2018-03-22 16:15:08 +08:00
kdump.sysconfig.ppc64le kdump.sysconfig.ppc64(le): remove "root=" param from ppc64(le) 2nd kernel's command line 2018-03-22 16:15:08 +08:00
kdump.sysconfig.s390x Remove kernel param "quiet" from kdump kernel cmdline 2015-12-11 15:18:31 +08:00
kdump.sysconfig.x86_64 kdump.sysconfig/x86_64: Add nokaslr to kdump kernel cmdline 2017-04-27 13:59:49 +08:00
kdumpctl kdumpctl: Remove 'netroot' and 'iscsi initiator' entries from kdump cmdline 2018-05-21 14:09:17 +08:00
kdumpctl.8 kdumpctl: add showmem cmd 2018-05-21 14:06:30 +08:00
kexec-kdump-howto.txt kexec-kdump-howto: Add doc about the special mount information via "dracut_args" 2016-08-26 14:03:48 +08:00
kexec-tools-2.0.3-disable-kexec-test.patch Disable kexec_test 2012-01-21 16:56:07 +08:00
kexec-tools-2.0.16-koji-build-fail-workaround.patch Workaround a koji build failure 2017-12-08 11:42:30 +08:00
kexec-tools.spec Release 2.0.17-2 2018-04-28 14:41:25 +08:00
live-image-kdump-howto.txt Revert "kdumpctl: filter 'root' kernel parameter when running in live images" 2017-04-11 16:03:12 +08:00
mkdumprd Revert "Use absolute path /usr/bin/dracut in mkdumprd" 2017-11-09 15:29:22 +08:00
mkdumprd.8 Remove comma which is redundant 2013-02-16 15:19:41 +08:00
README README: Add a README file 2014-04-02 10:45:36 +08:00
sources Release 2.0.17-2 2018-04-28 14:41:25 +08:00
zanata-notes.txt Add a notes for zanata process 2012-12-05 01:23:09 -05:00

README 

Adding a patch to kexec-tools
=============================
There is a mailing list kexec@lists.fedoraproject.org where all the dicussion
related to fedora kexec-tools happen. All the patches are posted there for
inclusion and committed to kexec-tools after review.

So if you want your patches to be included in fedora kexec-tools package,
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https://admin.fedoraproject.org/mailman/listinfo/kexec