tune sysconfig to save 2nd kernel memory usage
The memory in 2nd kernel is limited, we need to use as less memory as we can
to ensure vmcore capturing ok.
I'm doing below improvements in this patch:
1)
numa support is not necessary for kdump kernel, so disable it by adding numa=off
to save some kernel mm memory usage.
2)
Also add udev.children-max=2 to cmdline to limit max udev chidren processes.
3)
For ppc64, ehea driver will by default enable multi queue feature which will
use a lot of memory. Almost each ppc machine will oom for network(ssh/nfs)
kdump. The module param use_mcs=0 is used to disable multi queue feature.
Tested these params on an IBM machine with 2 numa nodes which ooms even for
local dump to rootfs.
With this patch oom does not happen for local/ssh dump, but for nfs dump oom
still happens in the middle of makedumpfile vmcore copying. So there should be
other improvement yet.
For ehea driver there's other params we can use, but because it's hard to
measure the saved memory, I'm waiting for input from IBM people. We can add
them later.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This reverts commit 05b67ee95c.
The old commit was merged for a emergent bug fixing on release 1.5.1
of makedumpfile. Now the upstream has been updated to v1.5.3, and this
patch has been included already.
For updating to makedumpfile v1.5.3, revert it.
In previous implementation of get_host_ip, global variable HOST_IP
is used to be a intermediate variable. In this case, if finally
failed to get HOST_IP, the original default value is also overwritten.
It's buggy.
Eg. in ssh case, when faied to get host ip, the default local host ip
"127.0.0.1" is lost too. that's not expected.
Change it by adding a local variable as intermediate variable.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
In previous patch, get_host_ip was introduced to make the dump dir
more readable and back compatible with rhel6. But the implementation
is not good, making variable DATEDIR ambiguous. In this patch, modify
those codes to make it clearer.
About code checking returned value of get_host_ip, if not zero the
function do_default_action is called. That looks buggy, it will
continue going through the later code flow. Add FINAL_ACTION after
invoking do_default_action.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This reverts commit 05b67ee95c.
The old commit was merged for a emergent bug fixing on release 1.5.1
of makedumpfile. Now the upstream has been updated to v1.5.2, and this
patch has been included already.
For updating to makedumpfile v1.5.2, revert it.
In man page, the removed comma is unnecessary, remove it in this page.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Current kdump image name prefix has changed from initrd to initramfs.
Tested on a vm running Fedora 18.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
V4: Sync with the latest teamd
V3: Drop patch 2/2 which harms readability
Move inst_dir to kdump_setup_team()
Avoid saying why teamdctl fails
Error out for vlan over team, like bridge
Remove the useless exit in kdump_get_perm_addr()
V2: remove the tmp config file in /tmp
split the non-team part
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=874025
(This BZ is against RHEL7 though...)
Depends on dracut patch:
http://article.gmane.org/gmane.linux.kernel.initramfs/3043
and depends on latest version of teamd.
This patch adds support for team devices on kdump side.
I tested team active-backup mode and round-robin mode,
vmcore can be dumped over ssh successfully.
Note, currently we don't support stacked devices
on/under team, it is tricky and can be added on request.
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
After recent dracut network changes, waiting for nic ready stuff is handled
in cmdline hooks when generate udev rules. So wait_for_net_ok is not
necessary any more in kdump.sh, Removing the code here.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
With recent dracut a bootdev is needed in cmdline, so dracut can waiting for
this nic ready early in initqueue. So in this patch bootdev=${_netnic} is added
[v1->v2]: use standard cmdline file name 70bootdev.conf
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
use standard cmdline file name start with digit number: 60kdumpnic.conf
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
To simplify the code logic, remove the previous PIPESTATUS handling because
previous patch "enable pipefail bash option" added pipefail option which will
also resolve this issue.
This is a reverting of below commit:
commit 3111ff74c9
Author: Chao Wang <chaowang@redhat.com>
Date: Mon Aug 6 14:49:52 2012 +0800
Change return value to indicate the result of dump_raw() correctly.
Resolves bz845916.
For raw dump code below:
$CORE_COLLECTOR /proc/vmcore | dd of=$1 bs=$DD_BLKSIZE >> /tmp/dd_progress_f
in case pipe fails it will still return 0, Fix this by return the PIPESTATUS
Signed-off-by: Chao Wang <chaowang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Follwing code will not return 1 if CORE_COLLECTOR /proc/vmcore fail:
$CORE_COLLECTOR /proc/vmcore | ssh $_opt $2 "dd bs=512 of=$_dir/vmcore-incomplete" || return 1
Fix it by enabling pipefail option
Tested in F18 with ssh dump.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
po/gu.po
po/or.po
po/zh_CN.po
These translations missed one '\n' so build fails with:
msgfmt --statistics --verbose -o gu.mo gu.po
gu.po:73: `msgid' and `msgstr' entries do not both begin with '\n'
Fix them by adding one more "\n"
Code in function kdump_install_net used to get server of network dump
is is a little redundent, can be optimized into one line. For nfs/ssh,
this line of code is enough.
Test passed on local kvm guest with Fedora 18.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Resolves: bz880551
Currently on fedora directory name of kdump is like 14.11.12-03:40:30.
It's not as readable as RHEL6. The old format of dir is host_ip-date-time.
This patch changes it back like ole one as below.
192.168.122.234-2012-10-31-05:17:20
If can't get HOST_IP for a network kudmp, we just fail. Becasue most
likely any attempt to save dump will also fail.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Currently the gtk spinbox use 64M as the spin step size, this means user
can only reserve memsize round down to 64M. But in fact user can simply
input the value which is not aligned to step size in the text entry. Also
user can use any value from kernel boot cmdline. Thus it will cause problem:
For example, booting with crashkernel=138M, firstboot spinbox will round down
it to 128M, and show 128M in spinbox value, but actualy reserved label will
show 138M, they are not consistent and confusing.
We have lowerBound value which is 128M, there's no reason to limit the increase
step as 64M, fix this by changeing the step to 1M.
Tested with fedora 18 for different values.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
We need fs dump target being mounted firstly before creating mkdumprd
This is because we want to get the mount options from kernel mountinfo
instead of simply mount it without considering mount options.
To avoid the filesystem being used by something other than kdump we
suggest them to mount it as 'ro', mkdumprd will remount it as 'rw' when
necessary and remount it back to 'ro'
In 2nd kernel kdump will still use 'rw' to mount it though.
Tested local read-only mounted fs dump.
[v1->v2]: improve documentation
add error handling for `mount -o remount,ro`
Fixed the changelog per Vivek's comment
The code was reviewed by Vivek.
Signed-off-by: Dave Young <dyoung@redhat.com>
Resolves: bz859783
Old po/ folder are not well maintained. All po files are just
same as the outdated pot file.
Translating team need kexec-tools to update it to
the conventional mode so it become available for translating.
Currently old translated po files are not maintained in git.
Instead it's a kexec-tools-po.tar.gz in dist git server.
see kexec-tools.spec: Source13. This patch will maintain them
in po/ and update the contents from lastest source code.
The refresh include below items:
1. update pot file from latest source code.
2. merge old translated po files with the new pot file
3. maintain translated po files in po/ folder
Also updated the Makefile to make the process more easier.
Usage after the update is like below:
a) simple `make` will generate the mo files for installation
b) `make install` will install mo files to locale directory
Above two command are used in rpm spec to install mo files
c) `make merge` will update pot file from source code and merge
translated po files with latest pot file. So it become ready for
translation team to translate
For kexec-tools maintaining, what we need to do is:
Once firstboot_kdump.py is modifed, we should run `make merge`
to update the po files for translation
After po files get translated they need to be copied to po/
and commit to git. Then create a kexec-tools-po.tar.gz and
upload the tar.gz to dist git, also update the checksum in spec
file.
Kdump systemd service should be enabled after installation like what
we do for old sysv init service.
systemctl enable will do daemon-reload automaticlly, so no need to
reload the daemon again. Please see manpage of systemctl about the detail.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz866357
MEM_RESERVED is for checking if crash memory is reserved or not.
Originally it use /proc/iomem for x86, parsing /proc/cmdline for ppc.
This cause problems for crashkernel=auto, because it does not fit for
the regular expression of [0-9]\+[MmKkGg]@[0-9]\+[MmGgKk]
Fix this by use /sys/kernel/kexec_crash_size for all arches.
After the fix the code is more clear than before.
[v1->v2] vivek: add space between "crash kernel"; remove misleading warning.
Tested-by: Chao Wang <chaowang@redhat.com>
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bug 868990
ssh will send local stdin input to remote side, this cause trouble
when we call ssh in the loop of parsing kdump.conf.
Ie. if we specify both 'ssh' and 'core_collector' option in kdump.conf,
and put 'core_collector' behind 'ssh', there will be no chance to
handle 'core_collector' because in get_ssh_size() ssh eat all the later
input of the while loop.
Fix this by use /dev/null as stdin in get_ssh_size().
Tested in fedora kvm guest.
Signed-off-by: Dave Young <dyoung@redhat.com>
Suggested-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
ssh: add random feeding code
openssh usually depends on /dev/urandom to seeding PRNG (pseudo-random number
generator). To ensure there's sufficient entropy just feed /dev/urandom with
saved /var/lib/random-seed which is saved in installing phase.
dracut_install will print error message, so just exit and do not print error
again.
Todo: other dracut_install fail and exit, such as dd, makedumpfile.
[v2->v3]: use [[:blank:]] for whitespace checking.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
We can use not only space but also tab as whitespace,
so s/\ /[[:blank:]] for checking the whitespace
The last commit is intend for checking multiple dump target,
and differentiate ssh and sshkey options. This issue is only
for ssh, so no need to add [[:blank:]] for other dump types to
create a very long code line.
[v1->v2]: use [[:blank:]] instead of [[:space:]]
see expanation in below doc:
http://en.wikipedia.org/wiki/Regular_expression#POSIX_character_classes
[:blank:] [ \t] Space and tab
[:space:] [ \t\r\n\v\f] Whitespace characters
Tested the [:blank:] works well as [:space:]
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
CC: Cong Wang <amwang@redhat.com>
Resolves: bz867703
For both ssh and sshkey specified in kdump.conf, we will error out:
[..]
+ start
+ local nr
++ awk 'BEGIN{cnt=0} /^raw|^ssh|^nfs|^ext[234]|^xfs|^btrfs|^minix/{cnt++} END{print cnt}' /etc/kdump.conf
+ nr=2
+ '[' 2 -gt 1 ']'
+ echo -n 'Error: More than one dump targets specified'
Error: More than one dump targets specified+ echo
Fix this by Improving the patterns for multi dump targes checking
with one more space.
Thanks ChaoWang for catching this and providing the fix.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
